ï»¿ Two billiard balls each of mass 0.05 kg moving in opposite directions with speed 6 m sâ€“1Â collide and rebound with the same speed. What is the impulse imparted to each ball due to the other? Â  from Physics Laws of Motion Class 11 Manipur Board

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Two billiard balls each of mass 0.05 kg moving in opposite directions with speed 6 m sâ€“1Â collide and rebound with the same speed. What is the impulse imparted to each ball due to the other?
Â

Mass of each ball, m = 0.05 kgÂ

Initial velocity of the ball = 6 m/sÂ

Magnitude of the initial momentum of the ball, p1 = 0.05 x 6

Â  Â  = 0.3 kg m/s

After collision, the balls change their directions of motion without changing the magnitudes of their velocity.

Final momentum of each ball, pfÂ = - 0.3 kg m/s

Impulse imparted to each ball = pf - pi = -0.3 -0.3 = -0.6 kg m/s

The negative sign indicates that the impulses imparted to the balls are opposite in direction.

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