What kind of work does the crane perform when the slab weighing 1 ton is evenly lifted to a height of 11 meters?

We calculate the useful work with a uniform rise of the plate by the formula:

A = Ft * h, where Ft is the force of gravity that acts on the plate (Ft = m * g, where m is the mass of the plate (m = 1 t = 1000 kg), g is the acceleration of gravity (we take g = 10 m / с2)), h is the height of the load lifting (h = 11 m).

Let’s calculate the useful work:

A = Ft * h = m * g * h = 1000 * 10 * 11 = 11000 J = 11 kJ.

Answer: With a uniform lifting of the plate, work is done at 11 kJ.