Linear Momentum and Collisions MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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When calculating the momentum of an object, which quantity is needed?
A. Mass and velocity
B. Mass and acceleration
C. Force and time
D. Energy and velocity
Answer: Mass and velocity
In an inelastic collision, which of the following is true?
A. Momentum is conserved, but kinetic energy is not
B. Kinetic energy is conserved, but momentum is not
C. Both momentum and kinetic energy are conserved
D. Neither momentum nor kinetic energy are conserved
Answer: Momentum is conserved, but kinetic energy is not
When two objects collide elastically and have the same mass, what happens to their relative speed after the collision?
A. It remains the same
B. It doubles
C. It becomes zero
D. It is halved
Answer: It remains the same
In a perfectly inelastic collision, what happens to the total kinetic energy?
A. It is not conserved and converted into other forms of energy
B. It is conserved
C. It increases
D. It remains the same
Answer: It is not conserved and converted into other forms of energy
In an elastic collision, the total momentum and kinetic energy of the system are:
A. Both conserved
B. Only momentum is conserved
C. Only kinetic energy is conserved
D. Neither momentum nor kinetic energy is conserved
Answer: Both conserved
In a two-dimensional collision, the conservation of momentum must be applied separately in:
A. The x and y axes
B. The x and z axes
C. The y and z axes
D. The direction of the impact
Answer: The x and y axes
The momentum of an object with a mass of 2 kg moving at 3 m/s is:
A. 6 kg·m/s
B. 5 kg·m/s
C. 3 kg·m/s
D. 2 kg·m/s
Answer: 6 kg·m/s
What happens to the total energy in a perfectly inelastic collision?
A. Some kinetic energy is converted into other forms of energy
B. Total energy is conserved
C. Kinetic energy is doubled
D. Energy is completely lost
Answer: Some kinetic energy is converted into other forms of energy
In a perfectly elastic collision, the relative velocity of approach is:
A. Equal to the relative velocity of separation
B. Greater than the relative velocity of separation
C. Less than the relative velocity of separation
D. Unrelated to the relative velocity of separation
Answer: Equal to the relative velocity of separation