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 19 of 71
- A. 11N
- B. 5N
- C. 7N
- D. 6N
Explanation: Force acting on B = Weight of A + Weight of B (because the weights are pointed in same direction)Note that the weight of C is not included…
Correct answer: 7N- A. 5
- B. 6
- C. 7
- D. 8
Explanation: As the force (pull of the balloon) acting on the packet is removed, it continues its straight-line motion up to the point where the…
Correct answer: 5- A. In motion
- B. At rest
- C. Both a and b
- D. None of these
Explanation: Newton's third law, also known as the law of action and reaction, states that for every action, there is an equal and opposite reaction.
Correct answer: Both a and b- A. 6
- B. 8
- C. 12
- D. 15
Explanation: The person covers half the distance, which is 3 km, in two-thirds of the total time, which is 30 minutes.
Correct answer: 12- A. Man driving a car on busy road
- B. Rock rolling down a mountain
- C. A luggage in flying airplane
- D. A car on a rough road
Explanation: If an aircraft is traveling at a steady speed, luggage in a flying airplane can be seen as not accelerating.
Correct answer: A luggage in flying airplane- A. Kinetic Energy (K.E.) is conserved
- B. Momentum is conserved
- C. Both a and b
- D. None of these
Explanation: In an elastic collision:a) Kinetic Energy (K.E.) is conserved: This means that the total kinetic energy of the system before the collision…
Correct answer: Both a and b- A. Mass and acceleration
- B. Mass and velocity
- C. Mass and weight
- D. Force and acceleration
Explanation: The laws of motion, specifically Newton's second law, show the relation between Force and acceleration.
Correct answer: Force and acceleration- A. Halved
- B. Doubled
- C. Tripled
- D. Remains same
Explanation: The momentum of a body is given by the product of its mass and velocity.
Correct answer: Doubled- A. Relationship of body, force and motion in response
- B. Relationship of body and force
- C. Relationship of body and motion
- D. Relationship of body and motion in response
Explanation: These laws provide the link between the forces acting on a body and the motion of the body in response to those forces.
Correct answer: Relationship of body, force and motion in response- A. 4
- B. 6
- C. 8
- D. 10
Explanation: Penetration relates to the kinetic energy available to do work against the planks.
Correct answer: 8- A. Rider is taken back
- B. Rider is suddenly afraid of falling
- C. Inertia of rest keeps the upper part of the body at rest whereas the lower part of the body moves forwards with the horse
- D. None of the above
Explanation: This is an example of inertia: when the horse accelerates forward, the rider's lower body is accelerated by the horse while the upper body…
Correct answer: Inertia of rest keeps the upper part of the body at rest whereas the lower part of the body moves forwards with the horse- A. Law of inertia
- B. Law of equilibrium
- C. Law of action and reaction
- D. None
Explanation: Newton's third law states that when two bodies interact, they apply forces to one another that are equal in magnitude and opposite in…
Correct answer: Law of action and reaction- A. Insufficient information
- B. 10 m/s
- C. 100 m/s
- D. 20 m/s
Explanation: Due to friction less surface, Loss of potential energy = Gain of kinetic energy mgh = 1⁄2 mv2, gh = 1⁄2 v2,v = √(2gh) , v = √(2x10x5), v=…
Correct answer: 10 m/s- A. 196 m
- B. 2 m
- C. 1/2 m
- D. 490 m
Explanation: The maximum height H reached by a ball thrown vertically upward can be calculated using the formula: H = v2/2g.
Correct answer: 490 m- A. 1.5 F
- B. 3 F
- C. 6 F
- D. 9 F
Explanation: Work done by the stopping force equals change in kinetic energy, which ∝ v².
Correct answer: 9 F- A. 120
- B. 180
- C. 300
- D. 480
Explanation: Force equals rate of change of momentum: F = (mass per bullet × velocity × bullets per second) = 0.03 × 30 × 200 = 180 N.
Correct answer: 180- A. A speed of 1 m/s
- B. An acceleration of 1 m/s²
- C. Acceleration of 980 cm/s²
- D. An acceleration of 1 cm/s²
Explanation: Newton's second law gives a = F/m. For F = 1 N and m = 1 kg, a = 1/1 = 1 m/s², which equals 100 cm/s² (not 980), so option B is correct in…
Correct answer: An acceleration of 1 m/s²- A. 0.5 N
- B. 1.5 N
- C. 2.5 N
- D. 3.5 N
Explanation: F = m (v - u) / t = 5 (7 -2) / 10 = 2.5 N .
Correct answer: 2.5 N- A. 9.8s
- B. 0s
- C. 10s
- D. 1s
Explanation: Horizontal velocity vx is constant = 9.8 m/s. Vertical velocity grows as vy = g t = 9.8t. Setting vx = vy gives 9.8 = 9.8 t ⇒ t = 1s.
Correct answer: 1s- A. It will stop
- B. It will move with the same speed in a different path
- C. It will move with the same speed along the same straight path
- D. It will move with a reduced speed along the same path
Explanation: In absence of external forces (fields), Newton's first law implies the body continues in uniform motion: constant velocity along the same…
Correct answer: It will move with the same speed along the same straight path