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Grade 12Discuss with colleagues and IITians

I tried solving this question by applying conservation of momentum. Like this,
speed=20/5=4m/s
So,(v1+4)40+(-v2+4)40=0
But,i am getting wrong answer!
Please answer this question and also tell me where i was doing wrong.

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Navneet Kumar

7 Years agoGrade 12

1 Answer

randheer

Approved Tutor Answer7 Years ago

the final velocity of system = 20/5 = 4m/s

total final momentum = (40+40+20)*4 = 400kg.m/s

V1(wrt ground) = V1+4

V2 (wrt groung) = V2-4

initial momentum = final momentum

40*V1-40*V2 = 400kg.m/s

V1-V2 = 10.

Solve about COM.

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