The fastest server in women's tennis is Sabine Lisicki, who recorded a serve at 131 mph (211 km/h) in 2014. Suppose that the mass of her racket was 428 g and the mass of the ball was 57 If her racket was moving at 210 km/h when it hit the ball, approximately what was the racket's speed after hitting the ball? Express your answer in kilometers per hour.

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To solve this problem we can use the principle of conservation of momentum The total momentum before ... View the full answer