A body is rotating uniformly about a vertical axis fixed in an inertial frame.
A body is rotating uniformly about a vertical axis fixed in an inertial frame. The resultant force on a particle of the body not on the axis is
(a) vertical
(b) horizontal and skew with the axis
(c) horizontal and intersecting the axis
(d) none of these.
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(c) horizontal and intersecting the axis
Explanation:
Since the body is rotating uniformly, a particle not on the axis moves in a uniform circular motion. This circle will be horizontal with its center at the intersecting point with the axis. So it has a radial acceleration and hence a radial resultant force. Thus this force will be horizontal and intersecting the axis.
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