Superman has a mass of 100kg and he crouches down till his center of mass is...
Superman has a mass of 100kg and he crouches down till his center of mass is 0.5 m above the ground and when he leaps his center of mass is 1.5 m above the ground at the instant when he leaps. How much force must his legs exert against the ground to leap 200 meters?
g = 10m/s^2
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