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Free Force and Motion MCQs with Answers

1,416 Force and Motion MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.

Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.

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Displacement and VelocityAccelerationProjectile MotionNewton's Laws of MotionLinear MomentumCollisions
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1,416 questions · page 10 of 71

181. An elevator is designed to carry a maximum weight of 9800 N (including its own weight), and to move upward at a speed of 5 m/s after an initial period of acceleration. What is the relationship between the maximum tension in the elevator cable and the maximum weight of the elevator while the elevator is accelerating upward?

  • A. The tension is greater than 9800 N.
  • B. The tension is less than 9800 N.
  • C. The tension equals 9800 N.
  • D. It cannot be determined from the information given.

Explanation: To move upward with acceleration, the elevator needs a net force in the upward direction.

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Correct answer: The tension is greater than 9800 N.

182. The coefficient of static Friction will always be _ than the coefficient of kinetic Friction.

  • A. Equal
  • B. Smaller
  • C. Larger
  • D. Both A and C are possible

Explanation: The coefficient of static friction is larger than the coefficient of kinetic friction because it requires more force to overcome static…

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Correct answer: Larger

183. What is the displacement of a person who walks 2km East then 2km North then 2 km west and then 2 km south?

  • A. 0 km
  • B. 8 km
  • C. 4 km
  • D. None of these

Explanation: The correct answer is Option A: 0 km. Displacement is the straight-line distance from the starting point to the ending point, along with…

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Correct answer: 0 km

184. A rock (m=2kg) is shot up vertically at the same time that a ball (m=0.5kg) is projected horizontally. If both start from the same height then

  • A. The rock and ball will reach the ground at the same time
  • B. The rock will reach the ground first
  • C. The ball will reach the ground first
  • D. The rock and ball will collide in air before reaching the ground

Explanation: The correct answer is that the ball will reach the ground first. When the rock is shot upwards, it experiences a delay in reaching the…

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Correct answer: The ball will reach the ground first

185. In uniform circular motion, tangential force is _

  • A. Maximum
  • B. Equal to radial force
  • C. Lesser than radial force
  • D. Zero

Explanation: The correct answer is Option D: Zero. In uniform circular motion, an object moves in a circle at constant speed, meaning there's no…

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Correct answer: Zero

186. A physics major builds a potato launcher and tests it in an open field. The student launches a potato with a velocity of 12m/s at an angle of 30°. The potato is found 60 meters from the launch site . Which of the following represents the maximum height achieved by the potato?

  • A. 0.3m
  • B. 1.8m
  • C. 5m
  • D. 18m

Explanation: The correct answer is Option B: 1.8m. To calculate the maximum height achieved by the potato, we need to consider the vertical component…

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Correct answer: 1.8m

187. A tractor pulls a log with a mass of 500 kg along the ground for 100 m. The rope( between the tractor and the log) makes an angle of 30°with the ground and is acted on by a tensile force of 5000N. How much work does the tractor perform in this scenario? (sin 30°=0.5 , cos 30°=0.866,tan30°=0.577)

  • A. 250 kJ
  • B. 289 kJ
  • C. 433kJ
  • D. 500 kJ

Explanation: The work done by the tractor is calculated using the formula: W = F * d * cos(θ), where F is the force, d is the distance, and θ is the…

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Correct answer: 433kJ

188. Which of the following statements is true for movement on a plane with friction?I. Acceleration is a function of applied force onlyII. More force is needed to accelerate a stationary object than an identical moving objectIII. The force of friction is independent of the mass of objects

  • A. I only
  • B. II only
  • C. I and II only
  • D. I and III

Explanation: The correct answer is Option B: II only. This is because a greater force is required to overcome static friction to start moving a…

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Correct answer: II only

189. A weightlifter lifts a 275 kg barbell from the ground to a height of 2.4 m. How much work has the weightlifter done in lifting the barbel and how much work is required to hold a weight at that height?

  • A. 3234J and 0J respectively
  • B. 3234J and 3234J respectively
  • C. 6468J and 0J respectively
  • D. 6468J and 6468J respectively

Explanation: To calculate the work done in lifting the barbell, use the formula Work = Force x Distance.

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Correct answer: 6468J and 0J respectively

190. A parachutist jumps from a plane. Beginning at the point when she reaches terminal velocity, which of the following is/are true? I. The jumper is in translational equilibrium. II. The jumper is not being acted upon by any forces. III. There is an equal amount of work being done by gravity and air resistance.

  • A. I only
  • B. I and III only
  • C. II and III only
  • D. I, II, and III

Explanation: At terminal velocity, the parachutist is in translational equilibrium (statement I) because the net force acting on her is zero; the…

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Correct answer: I and III only

191. Centrifugal force is an apparent outward force during circular motion. It has been described as a reaction force according to Newton's third law. Which of the following statements is most likely to be correct regarding centrifugal force?

  • A. Centrifugal force exists only for uniform circular motion, not non-uniform circular motion.
  • B. Centrifugal force exists only when tension or a normal force provides centripetal acceleration
  • C. Centrifugal force always acts antiparallel to the centripetal force vector
  • D. Centrifugal force is result of repulsive electrostatic interactions.

Explanation: The statement that centrifugal force always acts antiparallel to the centripetal force vector is likely to be correct because they are…

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Correct answer: Centrifugal force always acts antiparallel to the centripetal force vector

192. Type of friction that exists between a stationary object and the surface upon which it rests is called _

  • A. Kinetic Friction
  • B. Static Friction
  • C. No friction is present
  • D. Both A and B

Explanation: The correct answer is Option B: Static Friction. Static friction is the force that resists the initial motion of a stationary object in…

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Correct answer: Static Friction

193. A ball is thrown vertically up into the air from a window ledge 30 meters above the ground with an initial velocity of 10m/s. Find velocity of ball after 2 seconds.

  • A. 9.6 m/s
  • B. 29.6 m/s
  • C. 19.8 m/s
  • D. 2 m/s

Explanation: To find the velocity of the ball after 2 seconds, use the equation of motion v = u + at, where 'u' is the initial velocity, 'a' is the…

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Correct answer: 9.6 m/s

194. A baseball of mass 0.25 kg is thrown in the air with an initial speed of 30m/s but because of air resistance, the ball returns to the ground with a speed of 27m/s. Find the work done by air resistance.

  • A. -21.37J
  • B. 15 J
  • C. 21.37 J
  • D. -15 J

Explanation: The work done by air resistance can be determined by the change in kinetic energy of the baseball.

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Correct answer: -21.37J

195. A seesaw with a mass of 5kg has one block of mass 10kg two metres to the left of fulcrum and another block 0.5m to the right of the fulcrum. As shown below. If seesaw is in equilibrium, find the force exerted by the fulcrum.

  • A. 15 N
  • B. 40 N
  • C. 550 N
  • D. 500 N

Explanation: Option C is correct because the combined gravitational forces on the seesaw and the blocks must equal the force exerted by the fulcrum to…

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Correct answer: 550 N

196. Which of the following quantities is not a vector?

  • A. Velocity
  • B. Force
  • C. Displacement
  • D. Distance

Explanation: The correct answer is Option D: Distance. Scalars are quantities that have only magnitude, such as distance.

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Correct answer: Distance

197. A 30 kg child sits on a seesaw at a distance of 2m from the fulcrum. Where must the child's parent sit to balance the seesaw if the parent has a mass of 90kg

  • A. 67cm from the child
  • B. 67cm from the fulcrum
  • C. 133cm from the child
  • D. 267 cm from the fulcrum

Explanation: In order to balance the seesaw, the torque produced by the child and the parent must be equal.

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Correct answer: 67cm from the fulcrum

198. Which of the following is a conservative force?

  • A. Air resistance
  • B. Friction
  • C. Gravity
  • D. Convection

Explanation: Gravity is the correct answer as it is a conservative force; the work done only depends on the initial and final positions, not the path.

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Correct answer: Gravity

199. A consumer is comparing two new cars. Car A exert 250 horsepower while Car B exerts 300 horsepower. The consumer is most concerned about the peak velocity that the car can reach. If non conservative forces can be ignored, which of the following statements is true?

  • A. Car A and Car B both have unlimited velocities
  • B. Car A will reach its peak velocity more quickly than Car B.
  • C. Car A will dissipate less energy to the surroundings than Car B.
  • D. Car A will have a lower peak velocity than Car B.

Explanation: Option A is correct. In an idealized scenario where non-conservative forces such as friction and air resistance are ignored, both Car A…

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Correct answer: Car A and Car B both have unlimited velocities

200. A block of mass 'm' is slipping down a rough inclined plane with constant speed. The force on the block by the plane is:

  • A. mg
  • B. mg/2
  • C. Depends upon coefficient of friction
  • D. Depends upon angle of inclination

Explanation: This option is correct. The total force on the block by the plane (which is a combination of the normal force and frictional force)…

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Correct answer: Depends upon angle of inclination
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