A bucket of sand weighing 24.5 kg is lifted with a fixed block, acting on a rope with a cute 250 N. Calculate the efficiency of the block?

univerkov | December 5, 2020 | education

Given:
m = 24.5
g = 9.8
h = 10
F = 250

To find:
K.P.D.-?

Decision:
K.P.D. = Apol / Azatr * 100%
Apol = m * g * h = 24.5 * 9.8 * 10 = 2401 (J)
Azatr = F * h = 250 * 10 = 2500 (J)
K.P.D. = 2401/2500 * 100% = 96%
Answer: 96%

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