1.

A uniform sphere is place on a smooth horizontal surface and as horizontal force F is appied on it at a distance h above the surface. The acceleratioin of the centreA. is maximum at h = 0B. is maximum when h = RC. is maximum when h = 2RD. is independent of h.

Answer» Correct Answer - A
We have `(1)/(2)mv^(2)=mg(4-2)=2mg`
`v=sqrt(4g)=2sqrt(g)`
Now vertical component at `R = v sin 30^(@)=2sqrt(g).(1)/(2)=sqrt(g)`


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