A small block slides down from the top of hemisphere of radius \(R=3 \mathrm{~m}\) as shown in t....

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A small block slides down from the top of hemisphere of radius \(R=3 \mathrm{~m}\) as shown in the figure. The height ' \(h\) ' at which the block will lose contact with the surface of the sphere is  ________  \(m\).(Assume there is no friction between the block and the hemisphere)
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