Accepted Answer
Everybody is making something tough out of something easy.Everybody knows the formula [ Force = (mass) x (acceleration) ]. Right ?We're supposed to find the force on the skier when the skier is accelerating,and it gives us the skier's mass. So there you are !Net force on the skier = (64 kg) x (the skier's acceleration).It depends on the skier's acceleration, which we're not told.More acceleration = the result of more net force.More net force = the cause of more acceleration.And that is absolutely everything that you can do with the information that's given in this question.