A person with a mass of 90 kg performs a vertical jump on a force plate....

A person with a mass of 90 kg performs a vertical jump on a force plate. During the initial phase of the countermovement, vertical force is 540 N for 0.234 s. Then the force is increased to 1553 N and stays at that value until the jumper leaves the ground. At what point in time (s), referenced from the initial point of the countermovement, does the person reach the bottom of the movement? Prior to initiation of the countermovement, the velocity of the center of mass was zero.

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genius_generous answered 2 weeks ago

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