Question

Work id done on a ball when a soccer player kicks it. Is the player still doing work on the ball as it rolls across the ground? Explain.

Answer 1

The force that the soccer player kicked the ball with is still in effect, even though the player is not physically touching the ball. According to Newton's first law of motion, the object would stay in motion unless acted on by an unbalanced force. In this case, that force would be the friction of the ground.