A ball of mass 100 g hits a smooth vertical wallnormally with a velocity of 15 m/s four times persecond and rebounds each time with a velocity of 15m/s. The average force exerted on the wall is :A ON15 N30 N012 N
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wallnormally with a velocity of 15 m/s four times persecond and re… ... The average force exerted on the wall is :A ON15 N30 N012 N.
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