(Solved): A half circular ring shown in the figure below is released from =20. Use the following assum ...

A half circular ring shown in the figure below is released from $\theta =20^{\circ }$. Use the following assumptions to find the reaction force applied to the connecting point at $O$ right after it is released. - Mass of the ring $m=10\mathrm{kg}$. - Radius of the ring $r=0.3\mathrm{m}$. - Mass of the connecting bars, shown in red, are negligible.