Linear Momentum and Collisions MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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In a collision, if one object is initially at rest and the other object collides with it, the final momentum of the system is:
A. Equal to the initial momentum of the moving object
B. Zero
C. Equal to the initial momentum of the stationary object
D. Greater than the initial momentum
Answer: Equal to the initial momentum of the moving object
In a collision, if the initial kinetic energy of the system is greater than the final kinetic energy, the collision is:
A. Inelastic
B. Elastic
C. Perfectly elastic
D. Superelastic
Answer: Inelastic
When two objects collide and stick together, their combined mass:
A. Moves with a velocity equal to the center of mass velocity
B. Remains stationary
C. Moves with the velocity of the heavier object
D. Moves with the velocity of the lighter object
Answer: Moves with a velocity equal to the center of mass velocity
In an elastic collision, the relative velocity of approach before the collision is:
A. Equal to the relative velocity of separation after the collision
B. Greater than the relative velocity of separation
C. Less than the relative velocity of separation
D. Not related to the relative velocity of separation
Answer: Equal to the relative velocity of separation after the collision
During a collision, if the net external force is zero, the total momentum of the system:
A. Remains constant
B. Increases
C. Decreases
D. Depends on the type of collision
Answer: Remains constant
In a perfectly inelastic collision, which of the following quantities is conserved?
A. Momentum
B. Kinetic energy
C. Potential energy
D. Both kinetic and potential energy
Answer: Momentum
The impulse given to an object is equal to the:
A. Change in its momentum
B. Change in its kinetic energy
C. Force applied divided by time
D. Work done on the object
Answer: Change in its momentum
In a head-on elastic collision between two objects of equal mass, the object initially moving with velocity v:
A. Will come to rest, and the other object will move with velocity v
B. Will continue moving with velocity v
C. Will move with velocity -v
D. Will move with a velocity greater than v
Answer: Will come to rest, and the other object will move with velocity v
The law of conservation of linear momentum states that:
A. In the absence of external forces, the total momentum of a system remains constant
B. Momentum is always conserved in any type of collision
C. Kinetic energy is conserved in all collisions
D. Momentum is conserved only in elastic collisions
Answer: In the absence of external forces, the total momentum of a system remains constant