A 0.355 kg ball is dropped and reaches a speed of 1.44 m/s just before it hits the ground. It rebounds with a speed of 1.09 m/s. What is the magnitude of the change in the ball's momentum?

Question

mani_jha · Answer

The inital momentum is 0.355*1.44
The final momentum is 0.355*1.09
Change in momentum = Final momentum - Initial Momentum
Magnitude of change in momentum is the absolute value of the change in momentum, which means you have to ignore the negative sign. Is it ok?

anonymous · Answer

what is the direction of the total momentum before the collision?

mani_jha · Answer

The ball is moving downwards, so its momentum is also downwards. The ground cant move, so it has no momentum. So, before the collision, the total momentum is downwards, and after the collision, it starts moving upwards, and so its total momentum is also upwards.

mani_jha · Answer

Hey, where are u from?

anonymous · Answer

newfoundland, canada.