Question

Resuelve:

Answer 1

The work done is 1764 J

Explanation:

The work done in lifting an object is equal to the gain in gravitational potential energy of the object:

$W=mg \Delta h$

where

m is the mass of the object

g is the acceleration of gravity

$\Delta h$ is the change in height of the object

For the object in this problem, we have

m = 100 kg

$g=9.8 m/s^2$

$\Delta h = 3 m -120 cm = 3 m- 1.20 m = 1.80 m$

Therefore, the work done is

$W=(100)(9.8)(1.80)=1764 J$

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