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Force perpendicular to motion

Q & A: why is the magnetic force perpendicular to the motio

The superficial answer is simply that the Lorentz (magnetic) force is proportional to v × B, where v is the particle velocity and B is the magnetic field. Since the vector cross product is always at right angles to each of the vector factors, the force is perpendicular to v Independence of Perpendicular Components of Motion A force vector that is directed upward and rightward has two parts - an upward part and a rightward part

Video: Independence of Perpendicular Components of Motio

If you apply a force that keeps perpendicular to the motion as the object's motion is deflected, the absolute speed doesn't change. This is what you get when a body is in a circular orbit The force exerted by the person is an upward force equal to the weight of the box, and that force is perpendicular to the motion. If there is no motion in the direction of the force, then no work is done by that force. Yet you certainly feel like you are doing work if you carry a heavy box This type of force application occurs if the object is subjected to an aerodynamic side force which is perpendicular to the flight direction, such as the banking turn of an aircraft, or a thrown, spinning ball. If the force remains constant, and is applied perpendicular to the motion, the resulting path is a circular arc

A particle moves in a plane under the action of a force which is always perpendicular to the particle's velocity and depends on a distance to a certain point on the plane as 1/r^n, where n is Charged particles in a magnetic field feel a force perpendicular to their velocity. Since their movement is always perpendicular to the force, magnetic forces due no work and the particle's velocity stays constant A force F is applied to the object perpendicular to the radius r, causing it to accelerate about the pivot point. The force is kept perpendicular to r. Making Connections: Rotational Motion Dynamics Dynamics for rotational motion is completely analogous to linear or translational dynamics • The drag force acts in a direction that is opposite of the relative flow velocity (i.e., it opposes the relative flow) - Affected by surface area (form drag) - Affected by surface smoothness (surface drag) • The lift force acts in a direction that is perpendicular to the relative flow. - The lift force is not necessarily vertical Circular motion in a magnetic field Charged particles in a magnetic field feel a force perpendicular to their velocity. Since their movement is always perpendicular to the force, magnetic forces due no work and the particle's velocity stays constant

Typically one or more of the forces are resolved into perpendicular components that lie along coordinate axes that are directed in the direction of the acceleration or perpendicular to it. So in the case of a pendulum, it is the gravity force which gets resolved since the tension force is already directed perpendicular to the motion Magnetic fields exert forces on charged particles in motion. The direction of the magnetic force F F is perpendicular to the plane formed by v v and B B as determined by the right hand rule. The SI unit for magnitude of the magnetic field strength is called the tesla (T), which is equivalent to one Newton per ampere-meter

If the resultant force is always perpendicular to motion of a particle its speed will be constant so its KE will also be constant. Since Force is perpendicular to the direction of motion, work done also be zero. Therefore, A, B and C are corrects In physics, the Coriolis force is an inertial or fictitious force that acts on objects that are in motion within a frame of reference that rotates with respect to an inertial frame. In a reference frame with clockwise rotation, the force acts to the left of the motion of the object. In one with anticlockwise (or counterclockwise) rotation, the force acts to the right

The simplest case occurs when a charged particle moves perpendicular to a uniform -field (Figure 8.3.1). If the field is in a vacuum, the magnetic field is the dominant factor determining the motion. Since the magnetic force is perpendicular to the direction of travel, a charged particle follows a curved path in a magnetic field A force perpendicular to the direction of motion may change the direction of the object but will have no effect on the velocity in the given direction. This means that a horizontal velocity is independent of a vertical force or resulting velocity, such as caused by gravity (Force, velocity and field are all vectors—the 3-step right hand rule relates the direction of these three vectors.) Although you now have a free body diagram, you also need to recognize that magnetic force is always perpendicular to the motion of the charge. So when the charge changes direction, the force also changes direction The force that causes this curvature of motion in the rotating reference frame is the Coriolis force. It always points perpendicular to the object's velocity. This famous force is most widely associated with large-scale phenomena, especially in meteorology. However, the Coriolis force is named after a French mathematician who worked in a very.

3. F A force perpendicular to the direction of motion changes. WF is positive I negative / zero AKE is positive | negative / zero 4. F2 Fi Two forces act in opposition to one another. F1 tends to increase KE just as much as F2 tends to decrease KE. The net force is zero, so the object moves at constant velocity Centripetal acceleration and centripetal force a) Describe qualitatively motion in a curved path due to a perpendicular force, and understand the centripetal acceleration in the case of uniform motion in a circle. A body moving in a circle at a constant speed changes velocity (since its direction changes) Since the fluid is in motion, we can define a flow direction along the motion. The component of the net force perpendicular (or normal) to the flow direction is called the lift; the component of the net force along the flow direction is called the drag. These are definitions - Magnetic force perpendicular to v it cannot change the = × magnitude of the velocity, only its direction. - F does not have a component parallel to particle's motion cannot do work. - Motion of a charged particle under the action of a magnetic field alone is always motion with constant speed The special case of circular orbits is an example of a rotation around a fixed axis: this axis is the line through the center of mass perpendicular to the plane of motion. The centripetal force is provided by gravity, see also two-body problem. This usually also applies for a spinning celestial body, so it need not be solid to keep together.

6.11 Centripetal force • Describe qualitatively motion in a curved path due to a perpendicular force • On a curved motion the speed changes direction and hence it causes acceleration • the result due to Newton's second law is a centripetal force. i.e. towards the center of the circle that the curve pass through Figure 6.20 The frictional force supplies the centripetal force and is numerically equal to it. Centripetal force is perpendicular to velocity and causes uniform circular motion. The larger the. the smaller the radius of curvature r and the sharper the curve. The second curve has the same v, but a larger Breakout the gravity force vector into components which are parallel -mg*sin (Θ) and perpendicular -mg*cos (Θ) to the incline. The normal force will be equal and opposite to the perpendicular gravity component so N = +mg*cos (Θ). To keep the block from sliding, you would then need to apply a horizontal force equal and opposite to the.

Answers: 2 on a question: In what direction does the force of friction act? A. Perpendicular to the surface, pointing up B. Perpendicular to the surface, pointing down C. Along the surface, in the direction opposite to the motion D. Along the surface, in the same direction as the motion The direction of motion is affected but not the speed. Figure 6.4. 1: A negatively charged particle moves in the plane of the paper in a region where the magnetic field is perpendicular to the paper (represented by the small X 's - like the tails of arrows). The magnetic force is perpendicular to the velocity, so velocity changes in direction. Centripetal force is perpendicular to tangential velocity and causes uniform circular motion. The larger the centripetal force F c , the smaller is the radius of curvature r and the sharper is the curve

3. F A force perpendicular to the direction of motion changes. WF is positive I negative / zero AKE is positive | negative / zero 4. F2 Fi Two forces act in opposition to one another. F1 tends to increase KE just as much as F2 tends to decrease KE. The net force is zero, so the object moves at constant velocity Debraj Paul. Excellence Award Winner. 04/01/2018. Speed remains constant ,but direction will change,ex:uniform circular motion ,if a body moving in circular motion the only force acting is towards centre (cetripetal force),at any instant the force is perpendicular to velocity ,there only direction will change not speed ,speed remains constant the force is perpendicular to the surface a friction force can occur parallel to the surface of contact. physics 111N 4 force vectors forces have magnitude nature to attempt to describe objects in motion 1687 Every object continues either at rest or in constant motion If the force acts continuously at right angles to the velocity of the particle, then the particle goes around in a circle. This is like the planetary motion, Earth moving around the Sun. This is called uniform circular motion. Since the change in velocity is always perpendicular to itself, it contributes to change in the direction only - Weight: magnitude of the upward force needed to balance the gravitational force on the body due to an astronomical body N mg (5.5) - Normal force: perpendicular force on a body from a surface against which the body presses. - Frictional force: force on a body when the body attempts to slide along a surface. It is paralle

When the force is perpendicular to the motion direction

The direction of the force is in the direction opposite the object's direction of motion. The force the brakes exert to stop a car-Force x distance (*See note) The direction of the force is perpendicular to the direction the object moves. The gravitational force the Earth exerts on the Moon. K.E. is constant. In a circular motion the force is acting perpendicular to the direction of motion at all times during the motion. As a result the velocity and acceleration if changing its direction at all points but the kinetic energy remains constant during the motion. Answer verified by Toppr. Upvote (0 The magnitude of the Magnus force is about one third of the force due to gravity for typical curveballs. Figure 12: Origin of the Magnus force for a ball of radius , moving with speed , and spinning with angular velocity about an axis perpendicular to its direction of motion Central Force Motion Angular Momentum Force always directed towards one particular point (as in the toy model) When these conditions hold, there is another constant of the motion in addition to E: Force depends only on r, not on θ (as in toy model) € L=mr2θ˙ This is central force motion Friction Force F frict: The friction force is the force exerted by a surface as an object moves across it or makes an effort to move across it. There are at least two types of friction force - sliding and static friction. Though it is not always the case, the friction force often opposes the motion of an object Object Motion Due to a Side Force - NAS

• lems, you'll have to find the x- and y-components of this force. 152 Forces and Motion in Two Dimensions Components of Weight for an Object on an Incline A trunk weighing 562 N is resting on a plane inclined 30.0° above the horizontal. Find the components of the weight force parallel and perpendicular to the plane. Sketch the Proble
• At every instant, the magnetic force points perpendicular to the charge's velocity — exactly the force needed to cause circular motion. It is easy to ﬁnd the radius of this motion: if the particle has charge q and mass m, then Fmag = Fcentripetal qvB c = mv2 R R = mvc qB. 91
• True of false: For an object turning with constant speed in a non-perfectly circular path, the net force will not be exactly perpendicular to its motion I thought that this statement is true and that the centripetal acceleration vector always points toward the center of the orbited mass..
• The work done by the force during the first second of motion of the body is. Assertion : When the force retards the motion of a body, the work done is zero. Reason : Work done depends on angle between force and displacement. A force F acts on a body such that it is always at an angle of to the direction of motion
• In the simplest scenario, the applied force is perpendicular to the axis of rotation. In this case, torque is simply the product of the force and its distance from the axis of rotation: Image credit: physicstutorials.org. But in many applications, the force does not occur perpendicular to the axis of rotation
• Forces perpendicular to the direction of motion do no work. Figure 5.2: The force $$\vec{F}$$ causes the object to be displaced by $$\Delta \vec{x}$$ at angle θ. It is only the direction of the force on the object that matters and not the direction from the source of the force to the object
• The force was parallel to the motion for both. The force was toward the planet for Kepler, whereas the force was parallel to the motion for Newton. The force was parallel to the motion for Kepler, whereas the force was toward the planet for Newton. 6/16/2017 Ch. 10 H.W. 46/66 Kepler was the first to be credited for discovering that planets.

Motion under a force perpendicular to the velocity

If the friction force is greater than or equal to the forces in the direction of motion, then the net force is 0 and the object is in equilibrium. Key Terms. friction: A force that resists the relative motion or tendency to such motion of two bodies in contact. incline: A slope Furthermore, a force applied at the pivot point will cause no torque since the moment arm would be zero (r = 0). Another way of expressing the above equation is that torque is the product of the magnitude of the force and the perpendicular distance from the force to the axis of rotation (i.e. the pivot point) The simplest case occurs when a charged particle moves perpendicular to a uniform B-field (). If the field is in a vacuum, the magnetic field is the dominant factor determining the motion. Since the magnetic force is perpendicular to the direction of travel, a charged particle follows a curved path in a magnetic field The kinematics of rotational motion describes the relationships between the angle of rotation, angular velocity, angular acceleration, and time. It only describes motion—it does not include any forces or masses that may affect rotation (these are part of dynamics). Recall the kinematics equation for linear motion: v = v 0 + a t v = v 0 + a t. Circular motion is due to forces acting perpendicular to the direction of motion, such forces are called centripetal forces 58. The force that changes the straight path of a particle into a circular or curved path is called the: 'centripetal force' It is a pull on the body and is directed toward the center of the circle. 59

In centripetal force, why is force acting perpendicular to

Figuring out the components of the force due to gravity that are parallel and perpendicular to the surface of an inclined plane. Created by Sal Khan.Watch th.. A force applied at an angle to the direction of motion of an object can cause it to change direction. A side wind will cause an airplane to change its direction. It is possible that the object keeps going at the same speed, if the force is applied perpendicular to the direction of motion. But the velocity of the the object changes Both the forces are perpendicular to each other and hence the motion can be resolved into two independent motions- one in the vertical direction and the other in the horizontal direction. Part (a

Dynamics of Rotational Motion: Rotational Inertia Physic

Since motion and friction are parallel to the slope, it is most convenient to project all forces onto a coordinate system where one axis is parallel to the slope and the other is perpendicular (axes shown to left of skier) Forces and Straight-Line Motion. Force is a measure of the interactions between objects. It has both a magnitude and a direction, and so it is a vector quantity. The SI unit of force is the Newton (N), which is defined as, The superposition of forces relates to how forces add. If there are multiple forces acting on the same object, there is a. The farther the force is applied from the pivot, the greater is the angular acceleration; angular acceleration is inversely proportional to mass. If we exert a force $$F$$ on a point mass $$m$$ that is a distance r from a pivot point and because the force is perpendicular to r and acceleration $$a = F/m$$ is obtained in the direction of \(F. A force of constant magnitude F acts on a particle moving in a plane such that it is perpendicular to the velocity of the body and the force is always direct towards a fixed point. Then the angle turned by the velocity vector of the particle as it covers a distance S is (take mass of the particle as m) 11804990. 28.0k+ The centripetal force on an object in circular motion is a. perpendicular to the plane of the object's motion b. in the plane of the object's motion and perpendicular to the tangential speed c. in the plane of the object's motion and in the same direction as the tangential spee

1. describe how the tangential and perpendicular components of the net force vector aﬀect the momentum of the object. Uniform circular motion If a planet has just the right speed (for a given radius of orbit), then it will travel in circular motion with a constant speed. This is called uniform circular motion
2. In the case of $\theta=90^{\circ}$, a circular motion is created. If the particle's velocity has components parallel and perpendicular to the uniform magnetic field then it moves in a helical path. In the parallel case, there is no force on the particle but in the perpendicular one, there is a centripetal acceleration toward the center
3. The entire electromagnetic force F on the charged particle is called the Lorentz force (after the Dutch physicist Hendrik A. Lorentz) and is given by F = qE + qv × B. The first term is contributed by the electric field. The second term is the magnetic force and has a direction perpendicular to both the velocity and the magnetic field
4. Directions in circular motion Velocity ( v ) is tangential (lies on a tangent to the path). Centripetal acceleration and centripetal force are centripetal (point toward the center of a circle) or radial (lie on the radius of a circle)
5. The force is proportional to the cross product as you say - that means its direction depends both on the direction of the field and the velocity of the particle. All we know just from the field is that the force is perpendicular to it - this picks out a plane in which the force could possibly act, not a line
6. 1. The {eq}\rule{3cm}{0.15mm}{/eq} force is defined as the component of resultant the aerodynamic force perpendicular to fluid motion. (a) Drag (b) Lift (c) Inertial (d) Viscous (e) pressur
7. Reaction force is the force by the surface on the object perpendicular to it's motion. So if we apply force on the sliding block perpendicular to it's direction of motion, friction will increase. Friction and velocity have no connection what do ever. Friction increased as the normal force on the object increased Circular motion in a magnetic fiel

• 10-4. Dynamics of Rotational Motion: Rotational Inertia. Understand the relationship between force, mass and acceleration. Study the turning effect of force. Study the analogy between force and torque, mass and moment of inertia, and linear acceleration and angular acceleration. If you have ever spun a bike wheel or pushed a merry-go-round, you.
• when a moving object is acted upon by a force perpendicular to its motion: Chemical energy: the energy released or absorbed as a result of a chemical reaction: Fictitious force: one's inertia resisting friction (like in cars) Distance: a linear interval of space: Accelerometer
• in the mechanism, Block 2 is at constant speed. the gravity of the mechanism is in the horizontal plane perpendicular to the plane of motion. find the forces affecting joint A. Who are the experts? Experts are tested by Chegg as specialists in their subject area. We review their content and use your feedback to keep the quality high
• Horizontal motion is the movement of a projectile across a horizontal plane based on the force acting on it. Across short distances, the vertical and horizontal motions of the projectile are perpendicular to and independent of each other. Newton's second law of physics states that an object will continue to move at the same velocity as long.
• But if you consider a particular instant of motion, it has a velocity vector $\vec v$. As the charge moves the magnetic field exerts magnetic force on the charge and its direction is perpendicular to the plane containing $\vec v$ and $\vec B$. Figure 3 The magnetic force on the charge is towards the center of the circular path

Physics Tutorial: Pendulum Motio

1. The direction of friction is always opposite that of motion, parallel to the surface between objects, and perpendicular to the normal force. For example, if the crate you try to push (with a force parallel to the floor) has a mass of 100 kg, then the normal force would be equal to its weight, W = mg = ( 100 kg ) ( 9 . 80 m/s 2 ) = 980 N W = mg.
2. For uniform circular motion, the acceleration is centripetal acceleration: a = ac. Therefore, the magnitude of centripetal force, Fc, is Fc = mac. By using the two different forms of the equation for the magnitude of centripetal acceleration, ac = v2 / r and ac = rω2, we get two expressions involving the magnitude of the centripetal force Fc
3. Motion of a charged particle in a uniform magnetic field (Helical Motion) • When a charged particle has a velocity perpendicular to magnetic field, its path will be a circle. • When a charged particle has a velocity parallel to the magnetic field, it will move forward without any directional change. sin0 0 B F q v B qvB = ´ = =!!
4. No. At least not by the force that's perpendicular to the motion. When you push a baby stroller (or a car), you do work, but the force of gravity, downward and perpendicular to the motion, doesn't
5. The normal force N, is the force that a surface exerts on an object with which it is in contact. The normal force is exerted perpendicular to the surface. The Tension Force Tension T, is the force which is transmitted through a string, rope, or wire when it is pulled tight by forces acting at each end
6. The speed can be maintained if the force is applied in a perpendicular angle but the velocity will change. Now you can see there is an intimate relationship between force and motion. I hope you've found this post interesting and attained the knowledge

Magnetic Force on a Moving Electric Charge Boundless Physic

1. ant factor deter
2. Force on Charge Moving in a Magnetic Field. A force (F) on a moving charge (q) will be maximum at a velocity (v), perpendicular to Magnetic Field (B).. Force will be less with velocity at any angle less than perpendicular to the magnetic field and no force is present when velocity is parallel
3. Precession Torque. The spin angular momentum is along the rotation axis as shown, but the torque about the support point is in a direction perpendicular to the angular momentum. The torque produces a change in L which is perpendicular to L. Such a change causes a change in direction of L as shown but not a change in its size. This circular motion is called precession
4. • A charged particle experiences no magnetic force when moving parallel to a magnetic field, but when it is moving perpendicular to the field it experiences a force perpendicular to both the field and the direction of motion. • A current-carrying wire in a perpendicular magnetic field experiences a force perpendicular to both the wire and th
5. Should the forces perpendicular to the track be balanced? If the forces are unbalanced, explain why there is a net force and the direction of the net force. The forces perpendicular to each car are balanced. b. Draw a force diagram (side view) for a rollercoaster traveling over the top of a hill

If the resultant force is always perpendicular to motion

1. Review of Circular Motion If the force F is perpendicular to the velocity, the particle experiences circular motion: R mv F ma 2 = = r r R v F Force F is always perpendicular to velocity. F does no work. Problem: In an experiment with cosmic rays, a vertical beam of particles that have a charge magnitude of 3e and a mass 12 times the proton mas
2. Circular motion in a magnetic field. Charged particles in a magnetic field feel a force perpendicular to their velocity. Since their movement is always perpendicular to the force, magnetic forces do no work and the particle's velocity stays constant. Since the force is F = qvB in a constant magnetic field, a charged particle feels a force of.
3. [Minimum] [Zero] [maximum] [None of above] 7 people answered this MCQ question Zero is the answer among Minimum,Zero,maximum,None of above for the mcq If direction of motion of force is perpendicular to direction of motion of body, then work done will b
4. Longitudinal and Transverse Wave Motion. Mechanical Waves are waves which propagate through a material medium (solid, liquid, or gas) at a wave speed which depends on the elastic and inertial properties of that medium. There are two basic types of wave motion for mechanical waves: longitudinal waves and transverse waves
5. A force perpendicular to the velocity can only change the direction of the particle, and it can't affect the speed. In this case, the force will send the particle into uniform circular motion. The particle will travel in a circular path, with the plane of the circle being perpendicular to the direction of the field

Coriolis force - Wikipedi

• Centripetal force and the conservation of energy principle. We can also rewrite the centripetal force definition so that the force's direction is always perpendicular to the motion.. Now, let's recall the work's definition:. W = F · s
• The force of friction. The normal force is one component of the contact force between two objects, acting perpendicular to their interface. The frictional force is the other component; it is in a direction parallel to the plane of the interface between objects. Friction always acts to oppose any relative motion between surfaces
• magnetic force only when it enters the magnetic field with some velocity . The force is given as F ˘ 0 ˙˝ The direction of the force is along the normal to the plane containing the vectors and B. This means that the Lorentz force is always perpendicular to the displacement of the electron

8.3 Motion of a Charged Particle in a Magnetic Field ..

• Applied forces are those that can be applied on an object as a push or a pull.; The force of thrust is an applied force from an engine.; Tension is a resistance force when one object is being pulled.; A normal force is a reactionary force that resists the pull of gravity of an object when it is resting on a surface. This force acts perpendicular to the surface the object is resting on
• On top of a hill. The only forces acting on the rider are the upward normal force n exerted by the car and the downward force of gravity w, the rider's weight.These add together, as vectors, to provide the net force F net which is the centripetal force F c, directed toward the center of the circle. The normal force may also be called the rider's apparent weight for this is the force of the.
• Chapter 9. The Kinetic of Rotation: In Chapter 4, the kinetic of straight line motion was discussed where ΣF = Ma was the kinetic equation. ΣF was the net force or the cause of motion, M or mass was treated as a measure of resistance toward straight line motion, and a the acceleration caused by ΣF.. Here, in Chapter 9, the kinetic of rotation will be studied where ΣT = Iα is the kinetic.
• The normal force thus has equal magnitude and opposite direction of the component of the gravitational force that is perpendicular to the inclined plane. Using a free body diagram, all of these forces can be displayed, and the resultant motion can be predicted: Figure %: Free Body Diagram of an Inclined Plan
• Perpendicular components of motion do not affect each other. Now consider an air balloon descending through the air toward the ground in the presence of a wind that blows eastward. Suppose that the downward velocity of the balloon is 3 m/s and that the wind is blowing east with a velocity of 4 m/s
• Draw the normal force vector, which direction is simply perpendicular to the surface of interest and opposite to the net force calculated in step 4. What is the normal force. Newton's third law of motion states that every action has a reaction Horizontal Motion Unaffected by Gravity by Ron Kurtus

• e the velocity, acceleration and displa..
• This force is responsible to maintain the motion of the object in a circular path and is called centripetal force. The centripetal force acting on an object is always perpendicular to the displacement. The Centripetal Force is given as the product of mass and square of tangential velocity, divided by the radius. It is known as a real force
• Centripetal force is the component of force acting on an object in curvilinear motion which is directed toward the axis of rotation or centre of curvature. The unit of centripetal force is Newton. The centripetal force is always directed perpendicular to the direction of the displacement of the object
• Moment of a Couple: The ability of a couple to produce rotational motion in a body is measured in terms of torque. The magnitude of the torque is equal to the product of one of the forces and the perpendicular distance between the lines of action of the two forces. The moment of a couple about any point in its plane is constant and is equal to. A) Find the perpendicular component of torque (216.5 N) B) Find the torque using the perpendicular component of force (61 Nm when rounded to two digits) 4. What is the sum of all torques in the system above? Take each individual torque making the clockwise positive and counterclockwise negative. Then add all the numbers together and get a sum the force is perpendicular to the velocity. Recall that when a particle experiences a force of constant magnitude perpen-dicular to its velocity, the result is circular motion, as shown in Figure 2(b). Hence, if a charged particle is moving perpendicular to a uniform magnetic field, the particle will move in a circle In a projectile motion, the velocity is perpendicular to acceleration at. (A) no instance (B) one instant (C) two instants (D) all instants.. Check An. A particle is acted upon by a force of constant magnitude which is always normal to velocity of particle. The motion of particle is in plane The property of the electric line of force <br> a. Electric lines of force are just imaginary lines <br> b. Electric lines of force will be parallel to the surface of conductor <br> c. If the lines of force are crowded, them field is strong <br> d. Electric lines of force are closed loop Pressure is always acting perpendicular to the solid surface since there is no shear motion in static condition. Pz P q Px Z q q dAx=dAcos(q) dAz=dAsin(q) Projected Forces Buoyancy Horizontal Forces Examples Line of Action Hydrostatic Forces on Curved, Submerged Surfaces Projected Forces Buoyancy Horizontal Forces Examples Line of Action x Z. The force has a direction that is perpendicular both to the direction of motion of the charge and to the direction of the magnetic field. There are two possible precisely opposite directions for such a force for a given direction of motion