im sry i made a mistake.
solve it with this: avg power=sq root of 4.9 times mass times sq root of max height times 9.81
its very simple. potential energy at top=work= mgh. Avg power=mgh/time, time= sq of 2h/a then simplify to wat i typed above and solve. a=freefall acceleration.
tell me wat...
Can't you use delta y= Vi(t)+at^2/2? Vi=0, a=9.8, delta y measured solve for t then multiply t times two for the whole trip then divide delta E by delta t? seems reasonable although i usually overlook some detail -_-. tell me when you solve it. good luck.
i might be overlooking something but the problem is get force from kinetic energy?
KE=1/2mv^2 , m= F/a, replace m with F/a in the formula and solve for F?
however that's all i got i have no idea what the rest is talking about sry :(