Question

# The position of centre of mass of a system consisting of two particles of masses m1 and m2 separated by a distance L apart, from m1 will bem2Lm1+m2m1Lm1+m2L2m2m1L

Solution

## The correct option is A m2Lm1+m2If follows from the figure that, XCM=m1×0+m2Lm1+m2=m2m1+m2L YCM=m1×0+m2×0m1+m2=0 ZCM=m1×0+m2×0m1+m2=0 i.e., the centre of mass is at a distance [m2L(m1+m2)] from m1 internally on the line joining the two particles.  Hence, the correct answer is option (b).

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