A hockey ball of mass 200 g travelling at 10 m `s^(-1)` is struck by a hockey stick so as to return it along its original path with a velocity at 5 m `s^(-1)` .Calculate the change of momentum occurred in the motion of the hockey ball by the force applied by the hockey stick .

Explanation

Here, m=200 g=0.2 kg,u10 m`s^(-1)`,
`v=-5ms^(-1)`
Initial momentum of the hockey ball `0.2 kgxx10ms^(-1)=2kg ms^(-1)`
Final momentum of the hockey ball Chenge in momentumThe change in momentum is `-3 kg ms^(-1)`