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)

Options

A. `-0.1xx(40)-0.1 xx (30)`
B. `0.1 xx (40) -0.1 xx (-30)`
C. `0.1 xx (40) + 0.1 xx (-30)`
D. `0.1 xx (40) -0.1 xx (20)`

Answer

B

Explanation

Impulse = change in momentum `mv_(2)- mv_(1)= 0.1 xx 40 - 0.1 xx (-30)`