21. a hockey ball of mass 200 g 1 point
travelling at 10m/s2 is suck by a
hockey stick so as to return it
along its original path with a
velocity of 2m/s . Calculate the
change in momentum occured
in the motion of the hockey ball
after it is stuck by hockey stick
-24 kg m/s
/
0 -2.4 kg m/s
O 24 kg m/s
O 2.4 kg m/s​