Determine the efficiency of an inclined plane, the length of which is 5 m, the height is 1 m

Determine the efficiency of an inclined plane, the length of which is 5 m, the height is 1 m, if, when lifting a load weighing 350 N along it, it was pulled upwards with a force of 80 N.

S = 5 m.
h = 1 m.
P = 350 N.
F = 80 N.
Efficiency -?
The coefficient of efficiency The efficiency shows how the efficiently spent work of Azat turns into the useful work of Apol and is determined by the formula: efficiency = Apol * 100% / Azat.
The useful work of Apol is equal to the change in the potential energy of the body: Apol = m * g * h.
The body weight P is determined by the formula: P = m * g, then Apol = P * h.
The spent work Azat is determined by the formula: Azat = F * S, where F is the force that pulls the load, S is the movement of the load under the action of the force, in our case the length of the inclined plane.
Efficiency = P * h * 100% / F * S.
Efficiency = 350 N * 1 m * 100% / 80 N * 5 m = 87.50%.
Answer: The efficiency of the inclined plane is efficiency = 87.50%.