A soccer ball hits a wall. In the process, the place where the ball meets the wall is pushed about $5 \mathrm{~cm}$ toward the ball's center. Is the work done on the ball by the contact interaction between it and the wall positive, negative, or zero?

Question

Quizplus · Accepted Answer

The work done on the ball by the contact interaction between it and the wall is zero because the force is perpendicular to the displacement.

A Soccer Ball Hits a Wall 5 cm5 \mathrm{~cm}5 cm Toward the Ball's Center

A Soccer Ball Hits a Wall $5 \mathrm{~cm}$ Toward the Ball's Center