With the help of blocks, a bag of cement weighing 600 N is lifted to a height of 4 m.

With the help of blocks, a bag of cement weighing 600 N is lifted to a height of 4 m. What kind of work does a person do in this case?

Task data: P (weight of the cement bag) = 600 N; h (height to which you want to lift the bag) = 4 m.

Since both the fixed and the movable block do not give a gain in work, then for any system of blocks the work that a person performs can be determined by the formula: A = F * S = P * h.

Calculation: A = 600 * 4 = 2400 J (2.4 kJ).

Answer: When lifting a bag of cement, a person will do a work of 2.4 kJ.