Describe the motion of a ball as it rolls up a slanted driveway the ball starts at 2.5m/s slows down for 5.0s stops for an instant and rolls back down at an increasing speed. The positive direction is chosen to be up the driveway and the origin is at the place where motion begins. what is the sign of the ball's acceleration as it rolls up the driveway? what is the magnitude of the ball's acceleration?