A ball is thrown upwards and returns to the same position.Compared with its original speed after release,its speed when it returns is about
A)half as much.
B)the same.
C)twice as much.
D)four times as much.

Question

Quizplus · Accepted Answer

When the ball is thrown upwards, it gains potential energy which is converted into kinetic energy as it falls back down. Since energy is conserved, the speed of the ball when it returns to the same position must be the same as its original speed after release. Therefore, the correct answer is B, the speed is the same.

A Ball Is Thrown Upwards and Returns to the Same