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Transcript
```9-1 Momentum and Its Relation to Force
Example 9-1: Force of a tennis serve.
For a top player, a tennis ball may leave the
racket on the serve with a speed of 55 m/s
(about 120 mi/h). If the ball has a mass of
0.060 kg and is in contact with the racket for
about 4 ms (4 x 10-3 s), estimate the average
force on the ball. Would this force be large
enough to lift a 60-kg person?
```
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