Q42: A ball swings counterclockwise in a vertical circle at the end of a rope m long. When the ball is past the lowest point on its way up, its total acceleration is (- i ^ + j ^) m/s^2. For that instant,
(a) sketch a vector diagram showing the components of its acceler- ation,
(b) determine the magnitude of its radial accel- eration, and
(c) determine the speed and velocity of the ball.