There is a box weighing 20 kg on the floor. What work must be done to raise the box to a height of 150 cm?

Data: m (weight of the box standing on the floor) = 20 kg; h (height to which you want to raise the box) = 150 cm (1.5 m).

Constants: g (acceleration due to gravity) = 9.81 m / s2.

The work that will need to be done to raise the box by 150 cm will be equal to the change in its potential energy: A = En = m * g * h.

Let’s perform the calculation: A = 20 * 9.81 * 1.5 = 294.3 J.

Answer: To lift the box to a height of 150 cm, it is necessary to perform work of 294.3 J.