Determine the height to which the 4 kg weight was lifted using the movable block

Determine the height to which the 4 kg weight was lifted using the movable block, if the lifting was done with a work of 20 J.

Task data: m (cargo weight) = 4 kg; A (perfect work with the movable unit) = 20 J.

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

Since any movable block will not give a gain in perfect work, then the height to which the load was lifted can be determined using the formula: A = ΔEp = m * g * h and h = A / (m * g).

Calculation: h = 20 / (4 * 10) = 0.5 kg.

Answer: The lifting height of the load is 0.5 kg.