A ball is thrown 20.0 m/s at an angle of 40.0° with the horizontal. Assume the ball is thrown at ground level. A. How long does it take the ball to reach the wall? B. At what height does the ball hit the wall? C. Is it moving up or down at the instant before it hits the wall?
The ball's horizontal component of velocity (ie it's horizontal speed) is 20 cos 40degrees. Without knowing the distance of the ball to the wall it's difficult to go further ...