The ball keeps moving forward because of its momentum, which is not a force.
It is called spin, there are many forms of spin, * top spin * side spin (slice) * back spin
It is a push. See you push it forward with the tennis racket, making it go forward, away from you. When you pull something, you're bringing it toward yourself. But when you hit a tennis ball, you push the ball away from you.
Massively, that is if you want to become a serious tennis player. Every professional tennis player in the world uses top spin, and for two simple reasons: 1: Due to the forward rotation of the ball, the ball will dip more quickly than a shot without spin, thus allowing a player to hit the ball harder/higher as it will fall into the court lines quicker. 2: Again due to the forward ball rotation, upon hitting the ground the ball will bounce both higher and faster than a flat shot, thus making more difficult for an opponent to hit or to get in the correct position to strike the ball.
the snap of the wrist when thrown is a forward flick and causes the forward rotation to make the ball drop dramatically
When the ball is out side the court lines
Its a ball boy or a ball girl.
It is called a swing.
A tennis ball.