# The body is lifted along an inclined plane, applying a force of 30 N in the direction of movement. What is the body weight

**The body is lifted along an inclined plane, applying a force of 30 N in the direction of movement. What is the body weight if the length of the inclined plane is 1 m, the height is 25 cm and the efficiency is 80%?**

To find the mass of the body lifted along the considered inclined plane, we will use the formula: η = Ap / Az = m * g * h / (F * l), whence we express: m = F * l * η / (g * h).

Variables and constants: F – applied force (F = 30 N); l is the length of the considered inclined plane (l = 1 m); η – efficiency (η = 80% = 0.8); g – acceleration due to gravity (g ≈ 10 m / s2); h is the height of the plane (h = 25 cm = 0.25 m).

Calculation: m = F * l * η / (g * h) = 30 * 1 * 0.8 / (10 * 0.25) = 9.6 kg.

Answer: The body lifted along the considered inclined plane has a mass of 9.6 kg.