When a body is hinged at a point and a force is acting on the body in such a way that the line o...

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When a body is hinged at a point and a force is acting on the body in such a way that the line of action of force is at some distance from the hinged point, the body will start rotating about
\( \mathrm{P} \)
W the hinged point. The angular acceleration of the body can be calculated by finding the torque of that force about the hinged point. A disc of mass \( m \) and radius \( R \) is hinged at point \( A \) at its bottom and is free to rotate in the vertical plane. A force of magnitude \( F \) is acting on the ring at the top most point.
Component of reaction at the hinge in the vertical direction is
(1) \( \frac{4}{3} m g \)
(2) \( m g \)
(3) \( \frac{m g}{2} \)
(4) \( \frac{2}{3} m g \)
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