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

1 Answer
Jun 3, 2016

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)|)))