Question

a hockey ball of mass 200g traveling at 10m/s is stuck by a hockey stick so as to return it along is original path with a velocity of 5m/s. calculate the change of momentum.​

Answer 1

m = 200g = 0.2 kg

u = 10 m/s

v = -5 m/s-10

Change in momentum = m(v-u)

=0.2(-5-10)

=0.2×-15

=-3 kg m/s