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A small sphere of mass m =2kg moving wit...

A small sphere of mass `m =2kg` moving with a velocity `baru = 4hati - 7hatj m//s` colides with a smooth wall and returns with a velocity `barv = -hati + 3hatj m//s`. The magnitude of the impulse received by the ball is .

A

`5 kgms^(-1)`

B

`10 sqrt5 kgms^(-1)`

C

`20 kg ms^(-1)`

D

`15 kg ms^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
B
`J = m(v -u)`
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