Question

A 100g ball moving with a velocity of 20 ms-1 returns in opposite direction with a velocity of 30 ms-1 after striking a bat. The impulse is *

Answer 1

Answer:

Answer is 5

Explanation:

Impulse is rate of change of momentum

Initial momentum is = m x v = 0.1 x 20 = 2

Final momentum is = m x v' = 0.1 x - 30 = - 3

Change in momentum = final - initial momentum

= - 3 - 2 = - 5

There fore impulse = 5

Answer 2

Answer:

A 100 g ball moving with a velocity of 20m/s returns in opposite direction with a velocity of 30m/s after striking a bat. The impulse is