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Roger Federer is about to do his smooth, classical and effortless serve to Rafael Nadal in Australian open final. The ball is shot horizontally from a height of 3.0 m above the ground level of a tennis court, and 6.3 m from the net. The net is of height 0.9 m. Assume the ball only travels along the centreline of the court. The situation is shown in the Figure below. B 0.9 m 3.0 m |▬▬▬▬st Determine the horizontal velocity VA of the ball at point A so that it clears the net without touching it at point B. Also calculate the distances where the ball strikes the ground. 6.3 m

Roger Federer is about to do his smooth, classical and effortless serve to Rafael Nadal in Australian open final. The ball is shot horizontally from a height of 3.0 m above the ground level of a tennis court, and 6.3 m from the net. The net is of height 0.9 m. Assume the ball only travels along the centreline of the court. The situation is shown in the Figure below. B 0.9 m 3.0 m |▬▬▬▬st Determine the horizontal velocity VA of the ball at point A so that it clears the net without touching it at point B. Also calculate the distances where the ball strikes the ground. 6.3 m

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Roger Federer is about to do his smooth, classical and effortless serve to Rafael Nadal in Australian open final. The ball is shot horizontally from a height of 3.0 m above the ground level of a tennis court, and 6.3 m from the net. The net is of height 0.9 m. Assume the ball only travels along the centreline of the court. The situation is shown in the Figure below. B 0.9 m VA 6.3 m 3.0 m |▬▬▬st Determine the horizontal velocity V₁ of the ball at point A so that it clears the net without touching it at point B. Also calculate the distances where the ball strikes the ground. Note: Show your workings for each part of the question. Provide your answer to 2 decimal places.
Transcribed Image Text:Roger Federer is about to do his smooth, classical and effortless serve to Rafael Nadal in Australian open final. The ball is shot horizontally from a height of 3.0 m above the ground level of a tennis court, and 6.3 m from the net. The net is of height 0.9 m. Assume the ball only travels along the centreline of the court. The situation is shown in the Figure below. B 0.9 m VA 6.3 m 3.0 m |▬▬▬st Determine the horizontal velocity V₁ of the ball at point A so that it clears the net without touching it at point B. Also calculate the distances where the ball strikes the ground. Note: Show your workings for each part of the question. Provide your answer to 2 decimal places.
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