Determine the work performed when lifting a load weighing 4H to a height of 4m.
| August 3, 2021 | education
P = 4 N.
h = 4 m.
A -?
When lifting a load, the work of force F, which lifts it, will be determined by the formula:
A = F * S, where S is the movement of the load.
We will assume that the lifting of the load is uniformly rectilinear. Therefore, the force F, which lifts it, is balanced by the force of gravity m * g: F = m * g.
The weight of the body P is the force with which the body pulls on the suspension or presses on the support. With uniform rectilinear lifting of the load, its weight P is equal to the force of gravity m * g: P = m * g.
The work of force will be determined by the formula: A = P * h.
A = 4 N * 4 m = 16 J.
Answer: the force that lifts the load does the work A = 16 J.
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