1. The problem statement, all variables and given/known data An exceptional standing jump would raise a person 0.80m off the ground. To do this, what force must a 66 kg person exert against the ground? Assume the person crouches a distance of 0.20 m prior to jumping,and thus the upward force has this distance to act over before he leaves the ground. This question i dont even know how to start can some one explain how to even start it?