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OpenStudy (anonymous):
a ball of mass 65g hits a wall with a velocity of 5.2 ms^-1 perpendicular to the wall the ball rebounds perpendicularly from the wall with a speed of 3.7 ms^-1 the contact time of the ball with the wall is 7.5 ms 1) change in momentum please show to do i use the formula yet i get wrong answer
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