# Question: show workinga goalkeeper throws the ball just above the ground...

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A goalkeeper throws the ball just above the ground towards his defender, standing 15 m away. The ball has a deceleration of 2 m/s2 due to friction with the grass. The ball arrives at the defender with a velocity of 12 m/s. a) How much acceleration (assume constant acceleration) has the goal keeper given to the ball during the throwing action if its duration is 0.3 s? b) If the defender fails to stop the ball, how much further will the ball roll before stopping? c) How far will the ball roll, in total, in this case.