Free Linear Momentum MCQs with Answers
38 Linear Momentum MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Linear momentum is the vector product of mass and velocity, p = mv, and changes when a net external force acts. Work includes impulse as the change in momentum, conservation of momentum in isolated systems, collisions and explosions, and the distinction between elastic, inelastic and perfectly inelastic collisions.
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38 questions · page 2 of 2
- A. Less
- B. Zero
- C. Equals
- D. Greater
Explanation: The impulse imparted on an object during a collision is equal to the change in momentum of that object.
Correct answer: Equals- A. N
- B. Nm2
- C. Nm
- D. Ns
Explanation: "Option A" is "N" whose base unit is kg.ms-2 hence it is incorrect. "Option B" is "Nm2" and in base units, it is kg.ms-2 / m2 which will…
Correct answer: Ns- A. Momentum is quantity of motion
- B. Unit of momentum is N.s
- C. Momentum is not a vector quantity
- D. Momentum is product of mass and velocity
Explanation: Momentum is a vector quantity. The direction of an object's momentum vector is in the direction that the object is moving.
Correct answer: Momentum is not a vector quantity- A. Nm
- B. N/s
- C. Ns
- D. Ns2
Explanation: The unit for momentum can be Newton-second (Ns).
Correct answer: Ns- A. Law of conservation of energy
- B. Law of conservation of mass
- C. Law of conservation of momentum
- D. Newton's third law of motion
Explanation: This is due to the fact that momentum is conserved for all interactions, including collisions and explosions.
Correct answer: Law of conservation of momentum26. Two bodies of mass m and 4m are moving with the same kinetic energy. The ratio of momentum will be:
- A. 4:1
- B. 1:1
- C. 1:4
- D. 1:2
Explanation: Relation between Linear Momentum and Kinetic Energy is P= 2mK.E As mentioned in question K.E is same Therefore for m and 4m masses we have…
Correct answer: 1:2- A. 0.21
- B. 0.22
- C. 0.11
- D. 0.1
Explanation: .d) 0.1: This option is incorrect. The percentage change in linear momentum is approximately 0.105.
Correct answer: 0.1- A. 10%
- B. 20%
- C. 30%
- D. 40%
Explanation: Now, let's analyze the relationship between kinetic energy (KE) and momentum (P) of an object:Kinetic Energy (KE) = (1/2) * m *…
Correct answer: 20%- A. 4:1
- B. 1:2
- C. 0:1
- D. 1:6
Explanation: The kinetic energy and momentum are related as; K.E=P2/2m As mass and momentum are directly related, they will be related as;
Correct answer: 1:2- A. m2
- B. m1
- C. Both m1 and m2
- D. Not enough information is available
Explanation: Interior refers to volume, which cannot be determined by using the masses and velocities of the given objects.
Correct answer: Not enough information is available- A. 24 sec
- B. 2 sec
- C. 12 sec
- D. 8 sec
Explanation: To solve this problem, use the impulse-momentum theorem, which states that the impulse (force multiplied by time) is equal to the change…
Correct answer: 2 sec- A. 1/2m( vf2 -vi2 )
- B. Δt/ma
- C. m(vf-vi)/Δ t
- D. Mass
Explanation: According to Newton's 2nd law F=ma Putting a= vf-vi/∆t F= m(vf-vi)/∆t Solving this ahead F=mvf-mvi /∆t we know Momentum = mv So mvf =…
Correct answer: m(vf-vi)/Δ t- 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