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A ring P of mass m is set onto a smooth wire, which forms a fixed circumference in the vertical plane, as seen in the

A ring P of mass m is set onto a smooth wire, which forms a fixed circumference in the vertical plane, as seen in the figure. Due to the action of an unknown force F, which is tangential to the curve, the ring describes the trajectory with angular velocity.

image text in transcribedimage text in transcribed
2g D 1 - sin e RF P R

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