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A ball of weight 0.1 kg coming with spee...

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)

A

`0.1xx(40)+0.1+(-30)`

B

`0.1xx(40)-0.1xx(-30)`

C

`0.1xx(40)-0.1xx(20)`

D

`-0.1xx(40)-0.1xx30`

Text Solution

Verified by Experts

The correct Answer is:
B
Impulse = Change in momentum
`=mv- m (-u)= 0.1xx40 - 0.1xx(-30)`
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