1.A player stops a football weighing 0.5 kg which comes flying towards him with a velocity of 10 m/s. If the impact lasts for (1/50) th sec and the ball bounces back with a velocity of 15 m/s , then the average force involved is :
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A player stops a football weighing 0.5 k g which comes flying towards him with a velocity of 10 m/s. If the impact lasts for (1/50) th sec and the ball bounces back with a velocity of 15 m / s , then the average force involved is :
 th sec and the ball bounces back with a velocity of 15 m / s , then the average force involved is :){kind=link}