Question

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

Answer 1

Answer:

Explanation:

$P_{I\\}$=mv

  = 0.2*10

  =2kg m/s

$P_{f}$=mv

  =0.2* -5

  =(-1kg m/s)

change in momentum= Pf - Pi

                                    = -1kg m/s  (-2kg m/s)

                                    = -3kg m/s