Question

A ball of mass 0.4 kg is moving with a velocity of 72km/h is brought to rest by a player.What is the magnitude of average force exerted by the player

Answer 1

stopping distance =u^2/2g
20*20/2*10=20m
work energy theorm
w=1/2m(v^2-u^2)
w=f.s
f*20=1/2*.4(0-20^2)
f=4N
(im not sure about the answer though,kindly confirm it)