Az = 3.5 kJ = 3500 J.
m = 22 kg.
g = 10 m / s2.
h = 10 m.
The efficiency of the efficiency mechanism shows what part of the expended work Az goes into useful Ap.
Efficiency = Ap * 100% / Az.
Since a load of mass m is lifted to a height h, the useful work Ap will be determined by the formula: Ap = m * g * h, where g is the acceleration of gravity.
The efficiency will be determined by the formula: efficiency = m * g * h * 100% / Az.
Efficiency = 22 kg * 10 m / s2 * 10 m * 100% / 3500 J = 62.8%
Answer: the mechanism has an efficiency of 62.8%.
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