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 49 of 71
- A. 600 J
- B. 800 J
- C. 1000 J
- D. 1200 J
Explanation: To find the kinetic energy of the combined masses after the collision, first apply the conservation of momentum.
Correct answer: 800 J- A. Equal to that of Q
- B. Less than that of Q
- C. Greater than that of Q
- D. 3/7 times that of Q
Explanation: Projectiles launched at complementary angles (angles that sum to 90o) have equal ranges when launched with the same initial speed.
Correct answer: Equal to that of Q- A. Acceleration
- B. Momentum
- C. Force
- D. Inertia
Explanation: Newton's second law of motion is primarily concerned with how the net force acting on an object results in acceleration.
Correct answer: Force- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: It shows that acceleration is uniform which is true in case of free fall. Explanation is given below.
Correct answer: Option A- A. Acceleration is constant
- B. Acceleration is zero
- C. Acceleration is variable
- D. Velocity is zero
Explanation: The correct answer is that the acceleration is zero. This is because a straight line parallel to the time axis on a velocity-time graph…
Correct answer: Acceleration is zero- A. At rest
- B. Move with velocity comparable to the speed of light
- C. Moving slowly
- D. High velocity
Explanation: Newton's laws of motion are foundational for understanding the behavior of objects at everyday speeds.
Correct answer: Move with velocity comparable to the speed of light- A. Chance of collision
- B. Velocity
- C. Force acting
- D. Impulse
Explanation: The correct answer is that helmets decrease the force acting during a collision by extending the time over which the collision occurs.
Correct answer: Force acting- A. Half
- B. Twice
- C. √2 times
- D. Four times
Explanation: To solve this problem, we use the equation for the maximum height reached by an object thrown vertically upward: h = v02 / (2g), where v0…
Correct answer: Half- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: Speed = slope of distance-time graphThe slope of graph (A) is increasing. So, the speed is increasing.
Correct answer: Option A- A. Zero
- B. 5 N to left
- C. 2 N to right
- D. 2 N to left
Explanation: Total force in right side, Fright = 7 + 2 = 9N Total force in left side, Fleft =3 +4 = 7N Net force on body = Fright - Fleft =9 - 7 =2N…
Correct answer: 2 N to right- A. 0.5 m/s
- B. 4 m/s
- C. 2 m/s
- D. 8 m/s
Explanation: The change in speed can be calculated using the impulse-momentum theorem, which states that the impulse (force multiplied by time) is…
Correct answer: 2 m/s- A. 0.50m/s2
- B. 2.8m/s2
- C. 2.0m/s2
- D. 10m/s2
Explanation: Explanation is given below.We will use the formula F= ma to find the acceleration a but will have to calculate the resultant force F for…
Correct answer: 2.0m/s2- A. The action force is greater than the reaction force
- B. They act on different objects
- C. They are in the same direction
- D. The reaction force exists only after the action force is removed
Explanation: Newton's Third Law of Motion states: For every action, there is an equal and opposite reaction.
Correct answer: They act on different objects- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: From acceleration time graph, acceleration is constant for first part of motion so, for this part velocity of body increases uniformly…
Correct answer: Option B- A. parallel to time axis
- B. perpendicular to time axis
- C. Straight line from the origin
- D. Straight line inclined to the time axis at an angle of 45o
Explanation: The slope of a velocity-time (v-t) graph represents acceleration. If the acceleration of a body is zero, it means the velocity is…
Correct answer: parallel to time axis- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: An angle equally inclined to the horizontal and vertical means 0 = 45°. so, Rmax = u2/g R= u2 sin2(theta)/g sin2(45) sin(90) 1
Correct answer: Option A- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: Net force, F = maIn figure (A) net force is least. So, the acceleration is also least.
Correct answer: Option A- A. 15 N s
- B. 20 N s
- C. 30 N s
- D. 40 N s
Explanation: To solve this problem, we first calculate the final velocity of the body using the principle of conservation of energy.
Correct answer: 20 N s- A. 100 kgm/s
- B. 50 kgm/s
- C. 98 kgm/s
- D. 49 kgm/s
Explanation: To solve this problem, first calculate the final velocity of the stone after 4.0 seconds using the formula for velocity in free fall: vf =…
Correct answer: 100 kgm/s- A. 2 times
- B. 4 times
- C. 0
- D. Both A. and B.
Explanation: When two objects move in opposite directions with the same velocity, their relative velocity is the sum of their individual velocities.
Correct answer: 2 times