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Two bodies of mass 100 kg and 20 kg are moving with velocities  and  m/sec respectively. The magnitude of velocity of the centre of mass is______(in m/sec).

Correct answer is '3'. Can you explain this answer?
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Two bodies of mass 100 kg and 20 kg are moving with velocities and m/s...
If r1 and r2 are position vectors of two masses m1 and m2 then the position vector of their centre of mass Rcm is given as



Differentiating w.r.t. time, we get



120 x vcm = 360k


vcm = 3 m/s
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Two bodies of mass 100 kg and 20 kg are moving with velocities and m/s...
If r1 and r2 are position vectors of two masses m1 and m2 then the position vector of their centre of mass Rcm is given as

Differentiating w.r.t. time, we get
120 x vcm = 360k
vcm = 3 m/s
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Two bodies of mass 100 kg and 20 kg are moving with velocities and m/sec respectively. The magnitude of velocity of the centre of mass is______(in m/sec).Correct answer is '3'. Can you explain this answer?
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