Question

A ball of weight 0.1 kg coming with speed
30 m/s strikes with a bat and returns in
opposite direction with speed 40 m/s,
then the impulse is (Taking final velocity
as positive)​

Answer 1

Explanation:

impluse = change in momentum

= final momentum - initial momentum

= m (v-u)

= 0.1 ( 40 + 30 )

(+ is taken as the direction of initial and final velocity is opposite )

= 7 kg m s^-1

Answer 2

Explanation:

impulse is = to

=m(v2-v1) so 0.1(40+30) =7 kgm/s

v1 and v2 in opposite direction so v1 + v2