To what height was a load weighing 160N lifted on an 8m long deck if 800J was done?

To what height was a load weighing 160N lifted on an 8m long deck if 800J was done? what force did you have to apply to the load?

Data: P – weight of the lifted load (P = 160 N); L is the length of the flooring used, the movement of the load (L = 8 m); Ameh – perfect mechanical work (Ameh = 800 J).

1) Force applied to the load: F = A / S = Amech / L = 800/8 = 100 N.

2) Height of lifting the load: P * h = ΔEp = Ameh = F * S, from where we express: h = Ameh / P = 800/160 = 5 m.

Answer: The load was supposed to be lifted to a height of 5 m, a force of 100 N. was applied to it.