A Ball Is Thrown Vertically Upward with an Initial Speed

Multiple Choice

A ball is thrown vertically upward with an initial speed of 20 m/s. Two seconds later, a stone is thrown vertically (from the same initial height as the ball) with an initial speed of 24 m/s. At what height above the release point will the ball and stone pass each other?

A) 17 m
B) 21 m
C) 18 m
D) 27 m
E) 31 m