A rugby player with a mass of 126 kg and a velocity of 5.5 m s-1 tackles an opposition player who has the ball. The player with the ball has a mass of 94 kg and a velocity of -4 m s-1. Both players stay on their feet and the player with the ball is pushed backwards by the tackler. Calculate the initial velocity of the player with the ball when he is moving backwards as a result of the tackle.

A First Course in Probability (10th Edition)
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Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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A rugby player with a mass of 126 kg and a velocity of 5.5 m s-1 tackles an opposition player who has the ball. The player with the ball has a mass of 94 kg and a velocity of -4 m s-1. Both players stay on their feet and the player with the ball is pushed backwards by the tackler.

Calculate the initial velocity of the player with the ball when he is moving backwards as a result of the tackle.

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