A ball is thrown straight up in the air. What happens as the ball travels upward

Question

anonymous · Answer

what happens as in forces acting on the ball

anonymous · Answer

Describe the kinematics of the ball. Well the ball is only up in the air because it was thrown. That means that the ball naturally wanted to be on the ground. So the thrower had to exert some force to make the ball move counter to some force which was already being exerted on the ball (gravity). Does the ball keep going? Well the hand only exerts a force on the ball as it pushes it. The second the ball leaves the hand, the person no longer can help it resist gravity, so the ball will eventually succumb to gravity. If gravity acts on the ball, when the hand doesnt act on the ball then the only force will be pulling it back. If the hand can exert a force greater than gravity, the ball will leave the hand. In the air, the ball will eventually "come back", which means that direction of the velocity changed, which means that the ball was accelerating. Indeed the ball is accelerating downward even as the ball is still ascending, because the net force on the ball is only gravity. Since the Net force always shares the direction of its acceleration. The direction of gravity is the direction of the acceleration downward.

TLDR; The ball experiences a negative acceleration from gravity once it leaves the hand.