Have the jumper practice jumping and landing on the force plate while trying to keep their arms in the same position during the jump so that the location of their center of mass doesn’t change much th...Have the jumper practice jumping and landing on the force plate while trying to keep their arms in the same position during the jump so that the location of their center of mass doesn’t change much throughout the jump. If the person begins the air phase of the jump with the velocity you found above, how long will it take for their velocity to become zero at the peak of their jump?