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 70 of 71
- A. 8 sec
- B. 30 sec
- C. 60 sec
- D. 120 sec
Explanation: According to Newton's second law, Force is the rate of change of momentum i.e: F=∆p/∆t Since; F= 2NChange in momentum (∆p)= 120 kg…
Correct answer: 60 sec- A. A force applied
- B. A change in time
- C. A change in distance
- D. A change in temperature
Explanation: Fact. According to Newton's second law of motion, force is the rate of change of momentum i.e: F = d p/dt And hence a force acting for a…
Correct answer: A force applied- A. 300%
- B. 100%
- C. 50%
- D. 200%
Explanation: Let kinetic energy = E and momentum = pE=p²/2m Let initial kinetic energy, E1=EFinal kinetic energy.
Correct answer: 100%- A. Increases
- B. Decreases
- C. Remains constant
- D. None of the above
Explanation: Initially the shell will be stationary and hence have zero momentum. After explosion the fragments of shell will fly apart in different…
Correct answer: Remains constant- A. Heavy body
- B. Light body
- C. Both have same momentum
- D. None of these
Explanation: Heavy body: Momentum is given by the product of mass and velocity. Since the heavy body has a larger mass, even if the kinetic energies…
Correct answer: Heavy body- A. Acceleration
- B. Energy
- C. Force
- D. Impulse
Explanation: The unit of momentum is kg.m/s and the unit of mass is kg, so the unit of Pm would be kg2.m/s.
Correct answer: Energy- A. sin∅
- B. Cos∅
- C. Tan∅
- D. cot∅
Explanation: We know,f =uN .........(1)where u=coefficient of kinetic frictionN = normal forceN =mg cos ∅ (as in the diagram, N balances mgcos∅)and f=…
Correct answer: Tan∅- A. 2.45 ms-2
- B. 0.25 ms-2
- C. 4.9 ms-2
- D. 2.8 ms-2
Explanation: F=ma F is resultant force Force by 3 kg mass is 3 x 9.81 = 29.43 N BY 5 kg mass is 5 x 9.81 = 49.05 NThe resultant force is 49.05-29.43 =…
Correct answer: 2.45 ms-2- A. 9.8 N
- B. 13.8 N
- C. 5.8 N
- D. Zero
Explanation: Reading = mg - ma = (1)(9.8) - (1)(4)=9.8 - 4=5.8N
Correct answer: 5.8 N- A. 90N
- B. 60N
- C. 150N
- D. 100N
Explanation: The Correct Option is C as the person is moving with a net force of 150N in horizontal direction.
Correct answer: 150N- A. Zero
- B. 800 N upward
- C. 800 N downward
- D. 24 N downward
Explanation: The net force is zero bcz there is no acceleration. The strings of parachute are pulling against him in the upward direction with a force…
Correct answer: Zero- A. Sin θ
- B. Cos θ
- C. Tan θ
- D. Cot θ
Explanation: The coefficient of friction is a measure of the frictional force between the object and the surface it is sliding on.
Correct answer: Tan θ- A. Force and acceleration
- B. Mass and force
- C. Mass and velocity
- D. Acceleration and mass
Explanation: Newton's second law of motion states that the acceleration of an object is directly proportional to the net force applied to it and…
Correct answer: Force and acceleration- A. inertia of the body
- B. quantity of motion in the body
- C. Acceleration of body
- D. All of these
Explanation: Inertia means resistance to change. It is the property of the body by virtue of which it cannot change by itself its state of rest or of…
Correct answer: inertia of the body- A. 40 ms^-2
- B. 10 ms^-2
- C. 30 ms^-2
- D. 50 ms^-2
Explanation: In this scenario, the two blocks are in contact and can be treated as a single system with a total mass of 1.0 kg + 3.0 kg = 4.0 kg.
Correct answer: 10 ms^-2- A. Kinetic energy
- B. Velocity
- C. Momentum
- D. Acceleration
Explanation: For a body to be in equilibrium, it must have zero net acceleration, which is the result of all external forces canceling each other out.
Correct answer: Acceleration- A. The body speeds up
- B. The body rotates
- C. The body changes direction
- D. Mass of body decreases
Explanation: The correct answer is that the mass of the body decreases. The mass of a body is an intrinsic property that remains unchanged when a force…
Correct answer: Mass of body decreases- A. Is zero
- B. Is constant but not zero
- C. Increases uniformly with respect to time
- D. Is proportional to the displacement of the mass from a fixed point
Explanation: A mass accelerates uniformly when the resultant force acting on it is constant but not zero.
Correct answer: Is constant but not zero- A. Newton's 1st law of motion
- B. Newton's 2nd law of motion
- C. Newton's 3rd law of motion
- D. None of the above
Explanation: Newton's third law of motion states that every action will have an equal and opposite reaction.
Correct answer: Newton's 3rd law of motion- A. 800 N upwards?
- B. Zero
- C. 240 N downwards
- D. 360 N downwards
Explanation: Since force is found as the product of mass and acceleration, and acceleration in this case is 0 (as the parachute falls at a constant…
Correct answer: Zero