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27 January, 22:11

A 430 g soccer ball lying on the ground is kicked and flies off at 25 m/s. If the duration of the impact was. 01 s, what was the average force acting on the ball?

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  1. 27 January, 22:38
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    The average force acting on the ball is 1075 N in the direction of travel of ball.

    Explanation:

    Force is given by rate of change of momentum.

    Mass of soccer ball = 430 g = 0.43 kg

    Initial velocity = 0 m/s

    Final velocity = 25 m/s

    Change in momentum = 0.43 x 25 - 0.43 x 0

    Change in momentum = 10.75 kg m/s

    Time taken = 0.01 s

    Rate of change of momentum = Change in momentum : Time

    Rate of change of momentum = 10.75 : 0.01

    Rate of change of momentum = 1075 N

    Force = 1075 N

    The average force acting on the ball is 1075 N in the direction of travel of ball.
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