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Q.

Two bodies of masses 5kg and 3kg are moving towards each other with 2ms–1 and 4ms–1 respectively. Then velocity of centre of mass is

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a

0.25ms-1 towards 3kg

b

0.5ms-1 towards 5kg

c

0.25ms-1 towards 5kg

d

0.5ms-1 towards 3kg

answer is C.

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Detailed Solution

m1 = 5kg, m2 = 3kg, v1 = 2m/s, v2 = –4m/s= -0.25m/s = 0.25m/s toward 5kg
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Two bodies of masses 5kg and 3kg are moving towards each other with 2ms–1 and 4ms–1 respectively. Then velocity of centre of mass is