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<strong>Work</strong> <strong>and</strong> <strong>Energy</strong><br />
For instance, when you hit a tennis ball with your racket, we say the<br />
ball has had work done on it. That is, it gained energy. In this case<br />
the tennis racket caused the ball to move. The racket did work on<br />
the ball, thus transferring energy to the ball.
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