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 13 of 71
- A. F
- B. 2/3 F
- C. ½ F
- D. 1/3 F
Explanation: The correct answer is 1/3 F. In a frictionless system, the acceleration of the entire system is given by a = F / mtotal.
Correct answer: 1/3 F- A. g/4
- B. g/3
- C. 2g/3
- D. g
Explanation: To find the acceleration of the descending block, consider both masses as a single system.
Correct answer: g/4- A. 0
- B. 20
- C. 12
- D. 32
Explanation: At the top of the swing, the stone experiences two forces: the tension in the string and gravity.
Correct answer: 0- A. 0 kg/s
- B. 3 kg/s
- C. 6 kg/s
- D. 10 kg/s
Explanation: The explanation for this question will be added soon!
Correct answer: 3 kg/s- A. P > fand N < W
- B. P > f and N = W
- C. P = f and N > W
- D. P = f and N = W
Explanation: The correct answer is that P > f and N < W. The force P is applied at an upward angle, which means it has both horizontal and vertical…
Correct answer: P > fand N < W- A. 0.60
- B. 0.75
- C. 0.90
- D. 1.05
- E. 1.20
Explanation: To find the static coefficient of friction (μs), identify the angle of inclination (θ) at which the block starts to slip.
Correct answer: 0.75- A. 10N
- B. 49N
- C. 85N
- D. 98N
Explanation: The correct answer is Option B: 49N. To find the force required to keep the wagon from sliding down, we calculate the component of the…
Correct answer: 49N- A. greater than 60° above the horizontal
- B. greater than 45° but less than 60° above the horizontal
- C. greater than zero but less than 45° above the horizontal
- D. greater than zero but less than 45° below the horizontal
Explanation: In projectile motion, the optimal angle for maximum horizontal distance when launching from an elevation is less than 45°.
Correct answer: greater than zero but less than 45° above the horizontal- A. h/4
- B. h/2√2
- C. h/2
- D. h/√2
Explanation: When the projectile is fired straight up, all of its initial velocity contributes to reaching the height h.
Correct answer: h/2- A. Its speed is half of its initial speed.
- B. Its kinetic energy is half of its initial kinetic energy.
- C. Its potential energy is half of its initial potential energy.
- D. Its total mechanical energy is half of its initial value.
Explanation: In the absence of air resistance, the total mechanical energy of the object is conserved, which means it remains constant throughout the…
Correct answer: Its kinetic energy is half of its initial kinetic energy.- A. Joule
- B. Energy
- C. Dyne
- D. Foot Pound
Explanation: In the C.G.S (Centimeter-Gram-Second) system, the unit of force is the dyne.
Correct answer: Dyne- A. Zero
- B. 3 x 10^6 N downward
- C. 3 x 10^4 N upward
- D. 7.5 x 10^4 N
Explanation: The correct answer is 3 x 104 N upward. Since the helicopter is moving at a constant speed, the net force acting on it must be zero.
Correct answer: 3 x 10^4 N upward- A. Average velocity
- B. Uniform velocity
- C. Instantaneous velocity
- D. Variable velocity
- E. None of the above
Explanation: When the change in time is brought to zero this makes the velocity maximum. Which is also called instantaneous velocity.
Correct answer: Instantaneous velocity- A. 7/5 m/s
- B. 1 m/s
- C. 1/5 m/s
- D. 5 m/s
Explanation: Average Velocity = Total displacement/total timeThe car first travels 30m East and then travels 40m NorthThe net displacement, d (From…
Correct answer: 1 m/s- A. 1 m/s2
- B. 2m/s2
- C. 5 m/s2
- D. 10m/s2
Explanation: The average acceleration of a car can be calculated using the formula: Average acceleration = (change in velocity) / (time taken) In this…
Correct answer: 1 m/s2- A. 12.5 m/s
- B. 1.5 m/s
- C. 2.5 m /s
- D. 3 m/s
Explanation: The average velocity of an object is calculated by dividing the total displacement by the total time taken.
Correct answer: 1.5 m/s- A. Non-uniform
- B. Uniform
- C. Decreasing with distance
- D. Increasing with time
Explanation: In the absence of air resistance, all objects fall near the surface of the earth and move towards the earth with uniform acceleration.This…
Correct answer: Uniform- A. Acceleration
- B. Positive acceleration
- C. Deceleration
- D. Uniform acceleration
Explanation: Deceleration is the rate at which an object slows down. It is measured as the decrease in velocity per unit time, and is given by the…
Correct answer: Deceleration- A. Uniformly moving frame of reference
- B. Rest frame of reference
- C. Rotating frame of reference
- D. None of these
Explanation: A rotating frame of reference shows a change in direction hence a change in velocity, which is acceleration.
Correct answer: Rotating frame of reference- A. Particular displacement
- B. Instant acceleration
- C. Instant time
- D. Average time
Explanation: Correct Option: CInstantaneous velocity is defined at an instant of time.
Correct answer: Instant time