A ball of mass m moving with speed u makes a head-on elastic collision with an identical ball of mass m initially at rest. What are the velocities of the two balls after the collision?

Answer and explanation

Correct answer: A. First ball comes to rest; second ball moves with speed u

  1. Step 1: For elastic head-on collision of two equal masses, the velocities are completely exchanged.
  2. Step 2: The incident ball comes to rest (v1 = 0), and the target ball moves off with the incident speed (v2 = u).

Practise more Work, energy and power.

Free questions with an explanation for every one, and full timed JEE Advanced mock tests.

All Work, energy and power questionsTake a mock test

More Work, energy and power questions