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.
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