A red ball with a velocity of +3.0 m/s collides head-on with a yellow ball of eq

Question

A red ball with a velocity of +3.0 m/s collides head-on with a yellow ball of equal mass moving with a velocity of 2.0 m/s. What is the velocity of the two balls after the elastic collision?

The velocity of the red ball is +2.0 m/s; the velocity of the yellow ball is 3.0 m/s. The velocity of the red ball is 2.0 m/s; the velocity of the yellow ball is +3.0 m/s. The velocity of the red ball is +3.0 m/s; the velocity of the yellow ball is 2.0 m/s. The yellow ball stops immediately, and the red ball has a velocity of 1 m/s. The red ball stops immediately, and the yellow ball has a velocity of +1 m/s. The velocity of the red ball is 3.0 m/s; the velocity of the yellow ball is +2.0 m/s.

Explanation / Answer

It is a perfectly head on elastic collision

when this collision takes place between two identical balls (same mass) , the velocities of balls are interchanged after the collision.

So option (2) is correct

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