Two billiard balls, each of mass 0.05 kg, moving in opposite directions with speed 6 m/s collide and rebound with the same speed. What is the impulse imparted to each ball due to the other?

Solution

Mass of billiard balls = 0.05 kg
After collision the two balls rebound with same speed, therefore, the change in the momentum of each ball is,

increment p equals 2 m u

Substituting m = 0.05 kg and u = 6 m/s.

We get,
Impulse,

I italic equals italic increment p space equals space 2 cross times 0.05 cross times 6 equals 0.6 space Ns

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