1. A tennis pro serves a tennis ball at a speed of 190 km/hr. a) Assuming that the tennis racquet contacts the 0.057 kg ball for 0.2 s, then what is the average force on the ball? b) Assume that the ball does not get slowed down by drag or friction, and then the opponent returns the ball at a speed of 80 km/hr. Assuming again a contact time of 0.25 s, what average force is applied to the ball by the opponent's racquet?
1. A tennis pro serves a tennis ball at a speed of 190 km/hr. a) Assuming that the tennis racquet contacts the 0.057 kg ball for 0.2 s, then what is the average force on the ball? b) Assume that the ball does not get slowed down by drag or friction, and then the opponent returns the ball at a speed of 80 km/hr. Assuming again a contact time of 0.25 s, what average force is applied to the ball by the opponent's racquet?
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Transcribed Image Text:1. A tennis pro serves a tennis ball at a speed of 190 km/hr.
a) Assuming that the tennis racquet contacts the 0.057 kg ball for 0.2 s, then what is the
average force on the ball?
b) Assume that the ball does not get slowed down by drag or friction, and then the
opponent returns the ball at a speed of 80 km/hr. Assuming again a contact time of
0.25 s, what average force is applied to the ball by the opponent's racquet?
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