Figure (10-E14) shows a rough track, a portion of which is in the form of a cylinder of radius R. With what minimum linear speed should a sphere of radius r be set rolling on the horizontal part so that it completely goes round the circle on the cylindrical part.
Given:
Radius of cylinder= R
Radius of sphere= r
At the top most point
Let the velocity of the sphere= v
Applying law of conservation of energy