13) The figure shows a "bob" on the end of a string of length L = 2.0 m. The bob swings down from rest, Tarzan style, and then the string catches on a peg such that the bob swings in a circle up and over the peg. What is the speed (m/s) of the bob when it passes above the peg? String I. Bob Pivot U= ? 1.4 m I, Peg