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Three identical spheres, each of mass 1 ...

Three identical spheres, each of mass 1 kg are kept as shown in figure, touching each other, with their centres on a straight line. If their centres are marked
P,Q,R respectively, the distance of centre of mass of the system from P is

A

`(PQ+PR+QR)/(3)`

B

`(PQ+PR)/(3)`

C

`(PQ+QR)/(3)`

D

`(PR+QR)/(3)`

Text Solution

Verified by Experts

The correct Answer is:
B
`x_(cm)=(1xx0+1xxPQ+1xxPR)/(1+1+1)=(PQ+PR)/(3)andy_(cm)=0`
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