Question Detail

PHY 101 PHY 101 Past Questions Objective Question

Question

For a system of two colliding bodies with no external forces, the change in momentum of one body is:
Options
A Equal to the change in momentum of the other body.
B Larger than the change in momentum of the other body.
C Equal and opposite to the change in momentum of the other body.
Correct Answer
D Independent of the motion of the other body.
Correct Answer

Option C is the correct answer.

Detailed Explanation

The lecture shows that from conservation of momentum, m1(v1f - v1i) = -m2(v2f - v2i). This means the change in momentum of one body is equal in magnitude but opposite in direction to the change in momentum of the other.

Hint

Think about the gun and bullet example.

Question Info