Two billiard balls, each of mass 0.05 kg, moving in opposite directions with speed 6 ms-1 collide and rebound with the same speed. What is the impulse imparted to each ball due to the other?
Mass of each ball =0.05kg Initial velocity of each ball =6m/s Magnitude of the initial momentum of each ball, Pi=mvi=0.05×6=0.3 kg m/s After collision, the balls change their directions of motion without changing the magnitudes of their velocity. Final momentum of first ball, P1f=−0.3 kg m/s Final momentum of second ball, P2f=0.3 kg m/s Impulse imparted to first ball = P1f−P1i=−0.3−0.3 kg m/s=−0.6 kg m/s Impulse imparted to second ball = P2f−P2i=0.3−(−0.3)=0.6 kg m/s
