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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1,416 questions · page 31 of 71
- A. L sinϴ
- B. L cosϴ
- C. LF cosϴ
- D. LF sinϴ
Explanation: LF cosϴ: This option suggests that the moment of force is LF cosϴ. This is the correct answer.
Correct answer: LF cosϴ- A. v/4
- B. v/2
- C. v
- D. 5v/45v/4
Explanation: This is a case of inelastic collision. Let us consider the truck with mass 'm' is coming from the left with velocity '2v' ⇒ The momentum…
Correct answer: v/4- A. 2200 N
- B. 2300 N
- C. 2400 N
- D. 2600 N
Explanation: As the total length of the bridge is 12m and a man of 600N weight is standing at a distance of 4 m from X.
Correct answer: 2400 N- A. Zero
- B. 8.00 𝑁 upward
- C. 8.00 𝑁 downward
- D. 240 𝑁 downward
Explanation: The net force is zero because there is no acceleration. The strings of the parachute are pulling against him in the upward direction with…
Correct answer: Zero- A. Car "X' has half of the kinetic energy of car "Y'
- B. Car "X" has one quarter of the K.E of car "Y"
- C. Car 'X" has twice the K.E of car "Y'
- D. The two cars have the same KE
Explanation: Car X speed = v/2 amd mass = 2m Car Y speed = v and mass = m
Correct answer: Car "X' has half of the kinetic energy of car "Y'- A. 100 sec
- B. 120 sec
- C. 60 sec
- D. 50 sec
Explanation: Consider one point on the train as your frame of reference , so at any given point the train needs to travel 1200m ( 1km +200 m) to reach…
Correct answer: 120 sec- A. 10kg
- B. 20kg
- C. 40kg
- D. 80kg
Explanation: The breaking stress in each part of the wire will be the same as the original because of the same material.
Correct answer: 20kg- A. v
- B. 2v
- C. 3v/4
- D. 4v/3
Explanation: Using the law conservation of mass, Total momentum Before = Total momentum After Let x be the new speed of remaining mass (3m/4) mv = m1v1…
Correct answer: 4v/3- A. The particle has a constant acceleration.
- B. The particle has never turned around.
- C. The particle has zero displacement.
- D. The data is insufficient.
Explanation: The particle has a constant acceleration because the slope of the curve is constant.The particle turns around at t=10 seconds.The particle…
Correct answer: The particle has a constant acceleration.- A. 110 km/hr
- B. 120 km/hr
- C. 122 km/hr
- D. 126 km/hr
Explanation: Average speed = total distance / total timeTime taken to travel first 90 km = 90/80=1.125 h = 1h 7.5 minFor the rest of the journey…
Correct answer: 126 km/hr- A. 6 t
- B. T/6
- C. t√6
- D. t/√2
Explanation: Let the acceleration of free fall on Earth = gAcceleration of free fall on Moon = g16The stone is released from rest at a height of…
Correct answer: t√6- A. The force exerted by the horse on the ground
- B. The force exerted by the ground on the horse
- C. The force exerted by the wagon on the horse
- D. The force exerted by the horse on the wagon
Explanation: When the horse pulls the wagon, it pushes the ground in the backward direction.
Correct answer: The force exerted by the ground on the horse- A. Push water forward
- B. Push water backward
- C. Keeps the water steady
- D. Keeps the water undisturbed
Explanation: According to Newton's third law of motion, every action has an equal and opposite reaction.
Correct answer: Push water backward- A. Open system
- B. Closed system
- C. Isolated system
- D. Any system
Explanation: An isolated system is a collection of particles that can interact with each other but whose interactions with the environment outside the…
Correct answer: Isolated system- A. Same direction
- B. Opposite directions
- C. Perpendicular directions
- D. Five different direction
Explanation: The two bodies in contact will follow Newton's third law of motion. The third law states that for every action there is an equal and…
Correct answer: Opposite directions- A. Constant vertical acceleration
- B. Changing vertical acceleration
- C. Changing horizontal acceleration
- D. Constant (non zero) horizontal acceleration
Explanation: The only acceleration a free-thrown object experiences is the gravitational acceleration, which at all times is constant (in this case)…
Correct answer: Constant vertical acceleration- A. The rate of change of momentum while striking the wall is lower
- B. The rate of change of momentum while striking the wall is higher
- C. The wall does not move
- D. The mattress applies an equal and opposite force
Explanation: The rate of change in momentum when you hit the wall is more than when you hit a piece of sponge with an equal force.The rate of change in…
Correct answer: The rate of change of momentum while striking the wall is higher- A. One of them is not related to forces
- B. Two of them are not related to forces
- C. All of them are related to forces
- D. One of them is related forces
Explanation: Newton's laws of motion can be paraphrased as follows: 1. A body remains at rest, or in motion at a constant speed in a straight line…
Correct answer: All of them are related to forces- A. -500 N
- B. -1500N
- C. -2500N
- D. -3500 N
Explanation: Using the formula; Average force = mass × change in velocity / time F = ma = mass × change in velocity / time Average force = 1500 × 9(15…
Correct answer: -2500N- A. 0 meters
- B. -25 meters
- C. +25 meters
- D. 30 meters
Explanation: Displacement (Δx) = Final position (xf) - Initial position (xi)The final position (xf) and initial position (xi) can be represented as…
Correct answer: +25 meters