Question

The height in which a 50 kg object must be lifted so that its potential energy is 4,120.7 J is about

Answer 1

Given,

Mass, m = 50 kg

Potential energy, PE = 4,120.7 J

The potential energy of the object is calculated by the formula,

`PE=mgh`

Here, g is the acceleration due to gravity calculated as

`g=9.81m/s^2`

Calculate the height of the object.

`\begin{gathered} 4,120.7\text{ J = 50 }kg*9.81m/s^2* h \\ h=(4,120.7)/(50*9.81) \\ h=8.40\text{ m} \end{gathered}`

Thus, the height at which a 50 kg object must be lifted is 8.40 m.