In the figure, a 4.0−kg ball is on the end of a 1.6 m rope that is fixed at 0. The ball is held at point A, with the rope horizontal, and is given an initial downward velocity. The ball moves through three-quarters of a circle with no friction and arrives at B, with the rope tension = 79.8 N. The initial velocity of the ball in m/s, at point A, is closest to