force as function of theta

A ball of mass m and radius r rolls along a circular path of radius R,Its speed at the bottom os path is v0 Find the force of the path on the ball as a function of theta

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Lokesh Verma ·

eureka, can we safely presume that it is pure rolling at the bottom of the sphere??? (I think we can else the question to me does not make too much sense!)

If that is the case, then we need to balance energy to find the velocity dependent on θ

Then draw the fbd at angle theta and find the normal reaction and the friction.

They will be perpendicular.

The net force will be by pythagoras theorem!

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