What average power does a person develop when lifting a bucket of water weighing 12 kg
| September 16, 2021 | education
What average power does a person develop when lifting a bucket of water weighing 12 kg from a well 10 m deep in 15 seconds?
m = 12 kg.
g = 10 N / kg.
h = 10 m.
t = 15 s.
Nср -?
The average power of a person Nср is called the ratio of the work performed by him A to the time of its execution t: Nср = A / t, that is, the speed of performing mechanical work.
The mechanical work of a person A when lifting a bucket of mass m from a depth of h is expressed by the formula: A = m * g * h, where g is the acceleration of gravity.
The formula for determining the average power of a person will take the form: Ncr = m * g * h / t.
Nav = 12 kg * 10 N / kg * 10 m / 15 s = 80 W.
Answer: when raising the bucket, a person develops an average power of Nav = 80 watts.
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