A squash ball, of mass 60 g is thrown towards a wall at a speed of 35m/s .It rebounds off the wall in exactly the opposite direction,at aspeed of 15m/s.
a) Calculate momentum of the ball before the collision with wall.
b) Calculate momentum of the ball after the collision with wall.
a) Calculate momentum of the ball before the collision with wall.
b) Calculate momentum of the ball after the collision with wall.
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Answer:-
a) mass= 60 gram =60/1000=0.06kg.
Momentum before collision =?
Given velocity is 35m/s.
so, the momentum before collision is 2.1 kg.m/s.
b)mass= 60 gram =60/1000=0.06kg.
Momentum after collision =?
Given velocity is 15m/s.
But in opposite direction so negative sign should be associated with the velocity I.e.
so, the momentum after collision is -0.9 kg.m/s.
Magnitude of momentum will give 0.9 kg.m/s.