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 9 of 71
- A. mg
- B. 3mg
- C. 2mg
- D. None of these
Explanation: Initially, the tension in the string is T = mg, which equals the weight of the hanging body.
Correct answer: 2mg- A. 15 cm s-1
- B. 30 cm s-1
- C. 20 cm s-1
- D. 45 cm s-1
Explanation: The principle of conservation of momentum states that the total momentum before an impact is equal to the total momentum after the impact.
Correct answer: 15 cm s-1- A. 0.2πm/s
- B. 2πm/s
- C. 2m/s
- D. Zero
Explanation: When a particle completes one full circle, its total displacement is zero because it ends up back where it started.
Correct answer: Zero- A. 2πr, 2πr
- B. π, 2πr
- C. 2π, 2πr
- D. Zero, 2πr
Explanation: The correct answer is option D: Zero, 2πr. The particle's displacement is zero, and the distance covered is 2πr during one period of…
Correct answer: Zero, 2πr- A. 0.2πm/s
- B. 2πm/s
- C. 2m/s
- D. Zero
Explanation: The explanation for this question will be added soon!
Correct answer: Zero- A. is zero
- B. is not zero
- C. may or may not be zero
- D. depends on the acceleration
Explanation: Displacement is the shortest distance. If the displacement is zero that means the body has returned to its starting position.The M shows…
Correct answer: may or may not be zero- A. 0
- B. v
- C. v/2
- D. 2v
Explanation: When two cars are moving in opposite directions at the same speed v, their relative velocity is the sum of their speeds: v + v = 2v.
Correct answer: 2v- A. Straight-line passing through origin
- B. Straight line parallel to t- axis
- C. Quadratic relationship
- D. Cubic relationship
Explanation: This option is correct. For a linear relationship between displacement and time, the d-t graph will be a straight line that passes through…
Correct answer: Straight-line passing through origin- A. Area under graph represents displacement
- B. Gradient of the graph is constant
- C. Gradient of the graph repesents velocity
- D. Gradient of the graph represents acceleration
Explanation: Option A : In the displacement time graph, the area under the graph doesn't represent displacement.
Correct answer: Gradient of the graph repesents velocity- A. - 1 m/s.
- B. 2 m/s.
- C. 4 m/s.
- D. 6 m/s.
Explanation: The correct answer is 4 m/s as it is the highest velocity mentioned among the given options.
Correct answer: 4 m/s.- A. 1 m
- B. 1.5 m
- C. 2.5 m
- D. 5 m
Explanation: To find the difference in displacement, calculate the displacement from the starting point to 2 seconds and then from 2 seconds to 5…
Correct answer: 1.5 m- A. 0m
- B. 20m
- C. 50m
- D. 70m
Explanation: The correct answer is Option B: 20m. The person travels a total distance of 30m east and 40m north, which sums up to 70m.
Correct answer: 20m- A. 240 km/hr²
- B. 12,000 km/hr²
- C. 24,000 km/hr²
- D. 30,000 km/hr²
Explanation: The correct answer is Option C: 24,000 km/hr². To find the average acceleration, use the formula a = (v_f - v_i) / t, where v_f is the…
Correct answer: 24,000 km/hr²- A. Mass
- B. Distance
- C. Temperature
- D. Time
Explanation: Option C is correct. To calculate power, you need to know the work done and the time over which that work is done.
Correct answer: Temperature- A. No work is done
- B. The centripetal force does work
- C. The velocity does work
- D. Potential energy depends on position of the object around the circle
Explanation: In uniform circular motion, the object moves in a circle at a constant speed.
Correct answer: No work is done- A. 160m/s
- B. 260m/s
- C. 160,000m/s
- D. 260,000m/s
Explanation: The correct answer is Option A. The change in velocity of the rocket can be calculated using the formula: Change in Velocity = (Force /…
Correct answer: 160m/s- A. 90°
- B. 0°
- C. 45°
- D. 180°
Explanation: Torque is given by the formula Torque = rFsinθ, where r is the lever arm length, F is the magnitude of the applied force, and θ is the…
Correct answer: 90°- A. 0 J
- B. 400 J
- C. 800 J
- D. 2000J
Explanation: The total mechanical energy of the block at any point during its fall is the sum of its potential energy (PE) and kinetic energy (KE).
Correct answer: 2000J- A. Rotational
- B. Translational
- C. Second condition of equilibrium
- D. Both A and C
Explanation: The correct answer is Option B: Translational. Translational equilibrium occurs when the vector sum of all forces acting on an object is…
Correct answer: Translational- A. The instant he jumps.
- B. When he reaches terminal velocity
- C. Halfway through his fall
- D. Right before he lands on the ground
Explanation: When the firefighter jumps horizontally from the building, his initial velocity is purely horizontal (since no vertical component is…
Correct answer: The instant he jumps.