A sphere is moving at some instant with horizontal velocity {v}_{o} in right and angular velocity \omega in anti clockwise sense. If |vc|=|ωR|, the instantaneous centre of rotation is
A
At the bottom of the sphere
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B
At the top of the sphere
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C
At the centre of the sphere
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D
Anywhere inside the sphere
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Solution
The correct option is B At the top of the sphere The top of sphere being at instantaneous rest →v=vc−Rω=0 is the instantaneous center of rotation.