The machine evenly lifts a body weighing 20kg to a height of 10m in 20 seconds. What is its power equal to.

m = 20 kg;

s = 10 m;

t = 20 s;

g = 10 N / kg;

N -?

Power is calculated by the formula N = A / t, where A is the work done by the machine, t is the time during which the work was done. Work is calculated by the formula A = F * s, and F = m * g.

Then, N = (m * g * s) / t = (20 kg * 10 N / kg * 10 m) / 20 s = 100 W.

Answer: the power of the machine is 100 W.