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A uniform thin rod mass m and length R i...

A uniform thin rod mass m and length R is placed normally on surface of a solid uniform sphere of mass m and radius R as shown. Then the magnitude of gravitational force exerted by the sphere on the rod is:

A

l

B

m

C

A

D

Y

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Verified by Experts

The correct Answer is:
A
`because Deltal=(Fl)/(AY)=(mulv^(2))/(AY)=(mv^(2))/(AY)" "(because v=sqrt((F)/(mu))) implies Deltal` is independennt of l.
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