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 , with the rope horizontal, and is given an...

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 , 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 , with the rope barely under tension. The initial velocity of the ball, at point , is closest to