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.
Last updated
1,416 questions · page 33 of 71
- A. 2 kg/s2
- B. 8 kg/s2
- C. 4 kg/s2
- D. 16 kg/s2
Explanation: Since the rate of change of momentum is equal to the applied force. So, the rate of change of momentum will be equal to 4.
Correct answer: 4 kg/s2- A. The lead ball suffers a greater change in momentum compared with the tennis ball
- B. The tennis ball suffers a greater change in momentum as compared with the lead ball
- C. The momentum of the lead ball is greater than that of the tennis ball
- D. Both suffer an equal change in momentum
Explanation: The tennis ball suffers a greater change in momentum as compared with the lead ball.
Correct answer: The tennis ball suffers a greater change in momentum as compared with the lead ball- A. 26 s
- B. 5 s
- C. 6 s
- D. 2 s
Explanation: p=mv ; Δp=F x t hence, mv = Fx t F= mv/t = (1)(30)/6 = 5s
Correct answer: 5 s- A. The spheres stick together on impact.
- B. The total kinetic energy after impact is mv2 .
- C. The total kinetic energy before impact is zero
- D. The total momentum before impact is 2 mv
Explanation: Total K.E before impact = 1/2mv2 + 1/2mv2 = mv2 Since, it is an elastic collision total K.E is conserved, and it remains mv2 after the…
Correct answer: The total kinetic energy after impact is mv2 .- A. 3, 1.25
- B. 3.75, 1.25
- C. 4.25, 1.25
- D. 3, 1
Explanation: Total Speed = Total distance/Total time = 100 + 50 / 10 + 30 = 150/40 = 3.75 m/s Total Velocity= Total displacement/Total time = 100 +…
Correct answer: 3.75, 1.25- A. I and II only
- B. I and III only
- C. II only
- D. III only
Explanation: Option C is correct as only statement (ii) is true. Zero acceleration implies there is no change in speed.
Correct answer: II only- A. When a ball is bouncing off a wall
- B. When a car is accelerating
- C. When a drum skin is vibrating
- D. When a rocket is taking off
Explanation: Due to Newton's third law, friction force between the tyres and the road, exerts an equal and opposite force on the car.
Correct answer: When a car is accelerating- A. 1 kg m s-2
- B. 2 kg m s-2
- C. 3 kg m s-2
- D. 4 kg m s-2
Explanation: F = Δp/ Δt F = mΔv / Δt a = Δv / Δt F = 1 x 1 F = 1 kg m s-2
Correct answer: 1 kg m s-2- A. 5 m
- B. 7 m
- C. 8 m
- D. 23 m
Explanation: The following is the solution: The image shows three rectangles, with the following dimensions: Rectangle 1: 8m x 4m Rectangle 2: 2m x 3m…
Correct answer: 7 m- A. Zero
- B. 1 ms-1
- C. 3.14 ms-1
- D. 4 ms-1
Explanation: The following is the solution: Given: r = 2m Velocity = displacement/time For semicircle; Displacement = πr =3.14 x 2 = 6.28m t = 2 sec…
Correct answer: 3.14 ms-1- A. 15N
- B. 18N
- C. 24N
- D. 30N
Explanation: The following is the solution: The force on mass 2 is equal to the sum of the forces on masses 1 and 3, but since the spring is massless…
Correct answer: 24N- A. The first condition of equilibrium but not second
- B. Second condition of equilibrium but not first
- C. The first and second conditions of equilibrium
- D. Neither the first nor the second condition of equilibrium
Explanation: First condition of equilibrium: The condition states that a body will be in equilibrium if the resultant of all the forces acting on it is…
Correct answer: The first and second conditions of equilibrium- A. 36
- B. 38
- C. 41
- D. 43
Explanation: The final position of the cyclist at t=2 seconds will be 43 m Hence, D is the correct option.
Correct answer: 43- A. 40m
- B. 440m
- C. 0m
- D. 11m
Explanation: The following is the solution: The radius of the circular path, r=70m Time takes to complete one round, t=11s The total length of the…
Correct answer: 440m- A. 6.3 ms-1
- B. 5.3 ms-1
- C. 13 ms-1
- D. 12.5 ms-1
Explanation: Initial velocity, u=15m/sFinal velocity, v=0m/sDistance, s=18mAcceleration, a=?Using relation, v2 −u2 =2as02 −(15)2 =2a×18−225=36aa= 36…
Correct answer: 6.3 ms-1- A. zero acceleration
- B. constant acceleration
- C. increasing acceleration
- D. decreasing acceleration
Explanation: When a body is moving in an inertial frame of reference, it means that there are no external forces acting on the body.
Correct answer: zero acceleration- A. The frequency of the string
- B. The displacement of the string
- C. The tension of the spring
- D. The wavelength of the string
Explanation: The force acting opposite to the weight of the body attached to the string is called the tension force.
Correct answer: The tension of the spring- A. Speed = 6 m/s, velocity = 2 m/s
- B. Speed = 6 m/s, velocity = 6 m/s
- C. Speed = 2 m/s, velocity = 2 m/s
- D. Speed = 2 m/s, velocity = 6 m/s
Explanation: Speed = total distance/time = 10+20/5 = 6m/s Velocity = total displacement/time = 20-10/5 = 2m/s So A is the correct answer.
Correct answer: Speed = 6 m/s, velocity = 2 m/s- A. 0.2 m/s2
- B. 1.7 m/s2
- C. 3.7 m/s2
- D. 4.9 m/s2
- E. 9.1 m/s2
Explanation: The acceleration of the system can be found using Newton's second law. The net force on the system is the difference in weight of the two…
Correct answer: 0.2 m/s2- A. X
- B. 5X
- C. 10X
- D. X/2
Explanation: To find the stopping distance, we use the work-energy principle, which states that the work done by the force is equal to the change in…
Correct answer: 5X