Answer to Question #156967 in Mechanics | Relativity for Joseph Anderson

Question

A ball is thrown straight upward from the surface of earth which statement best describes the balls velocity and acceleration at the top of its flight

Answer 1

The speed is always directed in the direction of travel, that is, the speed is directed vertically UP.

But the acceleration, in this case, is directed downward, since the earth's gravitational force will act on the body, imparting the acceleration g directed vertically DOWN.