The efficiency of the inclined plane is 40%. When lifting a load on it, we did a work of 400J. What is useful work in the ethos process?
| November 29, 2020 | education
The efficiency is found by the formula
efficiency = A useful / A spent
We express useful work: efficiency × A spent
Efficiency = 40% = 0. 04
We consider useful work: Ap = 0. 04 × 400 = 160 J
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