A stone weighing 1 kg falls with a height of 20 m within 2 seconds. How much power does it develop?

univerkov | November 27, 2020 | education

Given:
m = 1 kg
h = 20 m
g = 10 m / s ^ 2
t = 2 s
To find :
N-? W
Decision :
A = ΔE
Ep = mgh
N = A / t
N = mgh / t
[N] = J / s = W * s / W = W
N = 1 * 10 * 20/2 = 100 (W).
Answer: 100 W.

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