If you are swinging horizontally and the ball comes off at a 45 degree angle, you did not impart all the velocity of the bat to the ball. The way to do this, but they're not going to do it, I'll tell you why in a minute,. Then, then the 110 mile an hour moving bat will send the ball at 110 miles per hour at a 45 degrees angle. Even though that's not the best angle, is the best combination of angle and speed given the configuration of what's going on at home plate.