Question

find change its momentum when 5 kg mass changes its velocity from 3m/s to 7m/s

Answer 1

u=3m/s
v=7m/s
m=5kg
change in momentum = final Momentum- initial momentum
=m.v-m.u
=
$5 \times 7 - 5 \times 3$
=35-15
=20kg.m/s