Question

What is the gravitational potential energy of a `9 kg` object on a shelf `4 m` high?

Answer 1

gravitational potential energy: `400J`

Explanation:

The gravitational potential energy of an object can be calculated with the formula:

`color(blue)(|bar(ul(color(white)(a/a)color(black)(E_g=mgh)color(white)(a/a)|)))`

`ul("where")`:
`E_g=`gravitational potential energy
`m=`mass
`g=`acceleration due to gravity
`h=`height

To find the gravitational potential energy of the object, substitute your known values into the formula.

`E_g=mgh`

`E_g=(9kg)(9.81m/s^2)(4m)`

`E_g=353.16J`

Rounding off to one significant digit,

`E_g~~color(green)(|bar(ul(color(white)(a/a)400Jcolor(white)(a/a)|)))`