Question

. A 0.2kg ball is moving at a velocity of 10m/s .It is hit a bat and its velocity changes to 5m/s in the opposite direction. What is the impulse of the ball?
A.5kg.m/s B.15kg.m/s C.10kg.m/s D.3kg.m/s

Answer 1

Impulse = Δp = m(vf - vi) = 0.2(−5 − 10) = 0.2(−15) = −3.0 kg·m/s.
Magnitude 3 kg·m/s → choice D.