A 250 g ball is thrown horizontally with a constant speed of 10 m/s. The ball hits the wall in 2 seconds and reflected with the same speed. What is the change in momentum and resultant force of the ball?
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Age of Baichung's Grandfather is x+26→46+26=72 years. Age of Baichung is 17 years. Age of Baichung's father is x+29→17+29=46 years.
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