You throw a baseball straight up. Compare the sign of the work done by gravity while the ball goes up with the sign of the work done by gravity while it goes down.

Question

Quizplus · Accepted Answer

When the baseball is thrown up, gravity does negative work because the force of gravity (downward) is opposite to the direction of motion (upward). On the way down, gravity does positive work because the force of gravity and the direction of motion (downward) are in the same direction.

You Throw a Baseball Straight Up