A ball is attached to a horizontal cord of length L whose other end is fixed (Fig.

Question:

A ball is attached to a horizontal cord of length L whose other end is fixed (Fig. 6-43).
(a) If the ball is released, what will be its speed at the lowest point of its path?
(b) A peg is located a distance h directly below the point of attachment of the cord. If h = 0.80L, what will be the speed of the ball when it reaches the top of its circular path about the peg?

Peg