That's true. If you hit pocket speed it will usually fall. If you hit em hard, it will end up short. Just hard enough to make the ball. Hitting harder then pocket speed will require english, or an aim point farther down tbe rail.
Well, no. If the object ball is on the cushion, it makes almost no difference to the bank angle how hard you hit the ball as long as you don't kiss. Try the shot with the object ball frozen and a full hit.