We lift a bucket of water weighing 10 kg using a fixed block to a height of 10 meters

We lift a bucket of water weighing 10 kg using a fixed block to a height of 10 meters, using a force of 120H, determine the efficiency.

Initial data: m (mass of a bucket of water) = 10 kg; h (the height to which the bucket was raised) = 10 m; F (force applied to lift the bucket) = 120 N.

Constants: g (acceleration of gravity) = 9.81 m / s2.

The efficiency of a stationary block when lifting a bucket can be determined by the formula: η = Ap / Az = ΔEp / (F * s) = m * g * h / (F * h) = m * g / F.

Calculation: η = 10 * 9.81 / 120 = 0.8175 (81.75%).

Answer: The efficiency of the fixed block is 81.75%.