A weight of 100 kg is lifted up to a height of 20m with an acceleration of 1.5 m / s ^ 2. What is the value of the perfect
| December 3, 2020 | education
A weight of 100 kg is lifted up to a height of 20m with an acceleration of 1.5 m / s ^ 2. What is the value of the perfect work of the hoisting device if its efficiency is 80%?
The coefficient of efficiency is the ratio of useful work to performed work, expressed as a percentage: n = Ap / Az * 100%
Useful work in this problem will be: Ap = Ph, where P = m (g + a)
Hence, Az = m (g + a) h / 0.8, substituting the numbers, we get: Az = 28750J
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