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. 50 kg⋅m/s
- B. 100 kg⋅m/s
- C. 300 kg⋅m/s
- D. 1000 kg⋅m/s
Explanation: Step 1: Acceleration calculation Applying Newton's second law ∑F=ma ⇒F=ma ⇒10(N)=20(kg) a ⇒a=0.5m/s2 Step 2: Final speed Since…
Correct answer: 100 kg⋅m/s- A. Lead
- B. Steel
- C. Gold
- D. Rubber
Explanation: The key to understanding the problem lies in the concept of change in momentum.
Correct answer: Rubber- A. 10 times
- B. 1000 times
- C. 100 times
- D. 10000 times
Explanation: To determine the maximum height reached by each object, we use the formula for the maximum height in projectile motion: h = v2/2g.
Correct answer: 100 times- A. Straight path
- B. Circular path
- C. Curved path
- D. Elliptical path
Explanation: When a stone is released from the window of a moving train, it continues to move horizontally at the same speed as the train due to its…
Correct answer: Curved path- A. Maximum
- B. Zero
- C. Minimum
- D. g
Explanation: In projectile motion, the only force acting is gravity, which causes a constant downward acceleration of g (approximately 9.8 m/s2).
Correct answer: g- A. 2π
- B. √2 π
- C. √(π2 + 4)
- D. π
Explanation: Let's say that point A on the wheel is in contact with the ground at Point B initially.
Correct answer: √(π2 + 4)- A. 2.5 ms-1
- B. 5 ms-1
- C. 7.1 ms-1
- D. 10 ms-1
Explanation: To solve this problem, we first need to determine the time it takes for the stone to fall 10 meters vertically.
Correct answer: 7.1 ms-1- A. III only
- B. I and III only
- C. I and II only
- D. II and III only
Explanation: Gravitational acceleration on the Moon is lower than on Earth. As a result, the bullet fired on the Moon takes longer to fall to the…
Correct answer: I and II only- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: When student drops a table tennis ball in air, then its speed increases due to force of gravity but acceleration due to gravity remains…
Correct answer: Option C- A. 0.5 m/s2
- B. 15 m/s2
- C. 2 m/s2
- D. 50 m/s2
Explanation: The average deceleration is calculated by the formula: Deceleration = (Final velocity - Initial velocity) / Time.
Correct answer: 2 m/s2- A. Vertical component of projectile motion
- B. A swinging pendulum
- C. Circular motion at constant speed
- D. Horizontal component of projectile motion
Explanation: The correct answer is the horizontal component of projectile motion. This component maintains a constant velocity as there are no external…
Correct answer: Horizontal component of projectile motion- A. Strikes the plane at the same time as the other body
- B. Strikes the plane earlier than the other body
- C. Has the vertical component of its velocity altered
- D. Has the vertical component of its acceleration altered
Explanation: When two bodies are falling with negligible air resistance, the horizontal and vertical motions are independent.
Correct answer: Strikes the plane at the same time as the other body- A. 150m
- B. 400m
- C. 305m
- D. 2550m
Explanation: Explanation is given below. numerical type question so only one answer is possible
Correct answer: 400m- A. 9.8 ms-1
- B. 49 ms-1
- C. 24.5 ms-1
- D. 98 ms-1
Explanation: To solve this problem, we first note that the total time for the bullet to return to its starting point is 10 seconds.
Correct answer: 49 ms-1- A. 10 kgms-2
- B. 5 kgms-2
- C. 50 kgms-2
- D. 2 kgms-2
Explanation: According to Newton's Second Law of Motion, the time rate of change of momentum of a body is equal to the net force acting on it.
Correct answer: 10 kgms-2- A. 4 m
- B. 24 m
- C. 12 m
- D. 36 m
Explanation: Distance covered by body = area under v-t graph with time axis. Since we have to find the distance between t= 2s and t= 5s, The area under…
Correct answer: 36 m997. The diagram represents the straight line motion of a car. Which of the follwoing statements is true?
- A. The car accelerates, stops, and reverse
- B. The car is moving for a total time of 12 s
- C. The car accelerates at 6 m/s2 for the first 2 s
- D. The car decelerates at 12 m/s2 for the last 4s
Explanation: Acceleration = slope velocity-time graph Acceleration in first 2s = 12 - 0/2 = 6 m/s2
Correct answer: The car accelerates at 6 m/s2 for the first 2 s- A. 15 m/s
- B. 2 m/s
- C. 30 m/s
- D. 0 m/s
Explanation: In an elastic collision involving two bodies of equal mass, the moving body transfers its velocity to the stationary body.
Correct answer: 15 m/s999. K.E is conserved in:
- A. Inelastic collision
- B. All collisions
- C. Elastic collision
- D. None of these
Explanation: An elastic collision is one in which both kinetic energy and linear momentum are conserved.
Correct answer: Elastic collision- A. The same speed
- B. Double the velocity of the incident particle
- C. Zero velocity
- D. Bounce back with the same velocity
Explanation: In collisions where a heavy particle (m1) collides with a much lighter particle (m2) that is initially at rest, the conservation of…
Correct answer: Double the velocity of the incident particle