A person lifts a package weighing 23 Kg. If she lifts it 2.8 m off the floor, what work has she done?

So, the work done by her is 631.12 J.

Hello ! I will help you regarding energy and its transformation. In this case, it's the use of energy from the lifter to be equivalent to potential energy, because the box undergoes a change in height and the potential energy specializes at a certain height. Work (W) due to change in potential energy () can be realized in the equation :

With the following condition :

We know that :

What was asked :

Step by Step :

So, the work done by her is 631.12 J.

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it