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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- A. m/s2
- B. m/s
- C. m
- D. 1/s
Explanation: Option A: m/s^2: This unit represents meters per second squared and is the unit of acceleration.
Correct answer: m/s- A. With different sizes of triangles drawn
- B. At a different point on curve
- C. At the start and end of the curve
- D. All of these options are correct
Explanation: The slope represents the gradient of a tangent of a curve at a given point on the curve.
Correct answer: With different sizes of triangles drawn- A. Speed
- B. Velocity
- C. Acceleration
- D. Momentum
Explanation: "Velocity" is defined as the rate of change of displacement. "Velocity" = Displacement / Time
Correct answer: Velocity1304. The displacement of objects with respect to a constant moving (v) frame in the same direction is?
- A. x - vt
- B. x + vt
- C. x
- D. x + vt + at2.
Explanation: When an object moves at a constant speed in the same direction then the velocity is also constant and it will not change the speed and…
Correct answer: x + vt- A. car travels 20 km due east and car travels 70 km due west.
- B. car travels 40 km due east then turns around and travels 20 km due west and car travels 20 km due east
- C. car travels 40 km due east then turns around and travels 20 km due west and car travels 70 km due east
- D. car travels 30 km due west then turns around and travels 30 km due east and car travels 40 km due east, then turns around and travels 20 km due west
Explanation: Trip A displacement: 40 Km east then 20 km west, in vector form we can say that the car travels +40 then -20.
Correct answer: car travels 40 km due east then turns around and travels 20 km due west and car travels 20 km due east- A. dx/dt
- B. Δx/Δt
- C. Δx.Δt
- D. Δv/Δt
Explanation: The instantaneous velocity of a body is defined as the limit of the ratio of the change in position ∆d to the small interval ∆t as ∆t…
Correct answer: dx/dt- A. area under graph represent displacement
- B. gradient of the graph is constant
- C. gradient of the tangent of graph represents acceleration
- D. gradient of the tangent of graph represents velocity
Explanation: If displacement time graph is a curve then the gradient of the tangent of the graph represents velocity because v = x/t
Correct answer: gradient of the tangent of graph represents velocity- A. m/s
- B. 1/s
- C. m/s2
- D. m/s3
Explanation: Correct Option: A(unit) m/s is the SI unit of velocity.The SI unit of velocity is meters per second (m/s).
Correct answer: m/s- A. Linear
- B. Quadratic
- C. Cubic
- D. Decreasing linearly
Explanation: If the velocity of a particle is varying linearly with time, then the shape of the distance-time (d-t) curve would be a quadratic curve.
Correct answer: Quadratic- A. Distance is greater than displacement
- B. Distance is less than displacement
- C. Distance is equal to displacement
- D. There is not enough information available
Explanation: We cannot determine the relationship between distance and displacement by using information about speed.
Correct answer: There is not enough information available- A. Its displacement is constant
- B. Its displacement changes due to change in distance
- C. Its displacement changes due to change in direction of motion
- D. Its displacement is always zero
Explanation: At the end of each revolution, the object returns to the initial point. Therefore, the net displacement covered is zero.
Correct answer: Its displacement is always zero- A. Only its distance is zero.
- B. Only its displacement is zero.
- C. Neither distance nor displacement is zero.
- D. Both distance and displacement is zero.
Explanation: Correct option is B. When an object moves in a circular path and returns back to its initial position then only its displacement is zero.
Correct answer: Only its displacement is zero.- A. 2πr
- B. 2r
- C. πr
- D. Zero
Explanation: When an object moves around a complete circle, it returns to its starting position.
Correct answer: Zero- A. N
- B. Nm2
- C. Nm
- D. Ns
Explanation: "Option A" is "N" whose base unit is kg.ms-2 hence it is incorrect. "Option B" is "Nm2" and in base units, it is kg.ms-2 / m2 which will…
Correct answer: Ns- A. Momentum is quantity of motion
- B. Unit of momentum is N.s
- C. Momentum is not a vector quantity
- D. Momentum is product of mass and velocity
Explanation: Momentum is a vector quantity. The direction of an object's momentum vector is in the direction that the object is moving.
Correct answer: Momentum is not a vector quantity- A. Nm
- B. N/s
- C. Ns
- D. Ns2
Explanation: The unit for momentum can be Newton-second (Ns).
Correct answer: Ns- A. Law of conservation of energy
- B. Law of conservation of mass
- C. Law of conservation of momentum
- D. Newton's third law of motion
Explanation: This is due to the fact that momentum is conserved for all interactions, including collisions and explosions.
Correct answer: Law of conservation of momentum1318. Two bodies of mass m and 4m are moving with the same kinetic energy. The ratio of momentum will be:
- A. 4:1
- B. 1:1
- C. 1:4
- D. 1:2
Explanation: Relation between Linear Momentum and Kinetic Energy is P= 2mK.E As mentioned in question K.E is same Therefore for m and 4m masses we have…
Correct answer: 1:2- A. 0.21
- B. 0.22
- C. 0.11
- D. 0.1
Explanation: .d) 0.1: This option is incorrect. The percentage change in linear momentum is approximately 0.105.
Correct answer: 0.1- A. 10%
- B. 20%
- C. 30%
- D. 40%
Explanation: Now, let's analyze the relationship between kinetic energy (KE) and momentum (P) of an object:Kinetic Energy (KE) = (1/2) * m *…
Correct answer: 20%