The student lifted the load to a height of 0.5 m using an inclined plane 1 m long

The student lifted the load to a height of 0.5 m using an inclined plane 1 m long, applying a force of 1.5 N directed along the plane to the load. What is the mass of the load if the efficiency of the plane in this process turned out to be 50%.

These tasks: h (the height the student lifted the load) = 0.5 m; L (length of the inclined plane, movement of the load) = 1 m; F (force applied by the student) = 1.5 N; η (process efficiency) = 50% (0.5).

Reference values: g (acceleration due to gravity) ≈ 10 m / s2.

We express the mass of the lifted load from the formula: η = ΔEp / A = m * g * h / (F * L), whence m = F * L * η / (g * h).

Calculation: m = 1.5 * 1 * 0.5 / (10 * 0.5) = 0.15 kg (150 g).

Answer: The weight of the load is 150 grams.