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A block of mass 2kg is travelling due ea...

A block of mass 2kg is travelling due east with velocity of 4m/s. what is the magnitude of momentum of B as seen from centre of mass frame of reference (in kg m/s).

A

`(2g)/(5)`

B

`(15)/(7)`

C

`(60)/(7)`

D

None of these

Text Solution

Verified by Experts

`V_("cm")=(3xx1-4xx4)/(1+4)=(-13)/(5)`
Momentum of B w.r.t. cm`=4[4-(13)/(5)]=(28)/(5)`
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