A body weighing 20 kg is lifted vertically upward with a constant force, the modulus of which is 400 N. The direction of the force vector coincides with the direction of the vector of displacement of the body,
a) Find the work of this force if the body has risen 10 m.
b) What kind of work does the force of gravity do?
a) A = P * S = 400N * 10m = 4000J b) A = F * h = mgh = 20kg * 10m * 10m = 2000J
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