A simple pendulum is made up of a 400-g mass attached to a 1.30-m string. It is pulled to the side and then released. Later a clock is started at the instant the mass is moving at its maximum velocity of 30 cm/s [R]. 1 At what time t is the velocity of the mass 20 cm/s [L] for the third time? Ans: t= 3.13 s 2 What is the location of the mass relative to the equilibrium point when it rst has a velocity of 26.8 cm/s [L]? Ans: 1: =4.91 cm [R]