Determine the work that is done when lifting a 4 kg box to a height of 2.5 m.
| September 30, 2021 | education
m = 4 kg.
g = 9.8 m / s ^ 2.
h = 2.5 m.
A -?
The work of force A, when lifting the body, is determined by the formula: A = F * h, where F is the force under which I lift the load, h is the height of the load.
The force F with which the load is lifted, according to Newton’s 3 law, is equal to the force of gravity m * g: F = m * g.
The formula for determining the work will take the form: A = m * g * h.
A = 4 kg * 9.8 m / s ^ 2 * 2.5 m = 98 J.
Answer: when lifting the body, work is done A = 98 J.
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