Question

a 2kg mass is held 4m above the ground. what is the approximate potential energy of the mass with respect to the ground?

Answer 1

The potential energy of the object is 78.4 J

Explanation:

The gravitational potential energy (GPE) of an object is the energy possessed by the object due to its position in a gravitational field.

For an object near the Earth's surface, the GPE is given by:

$GPE=mgh$

where

m is the mass of the object

$g=9.8 m/s^2$ is the acceleration of gravity near the Earth's surface

h is the height of the object relative to the surface

For the object in this problem,

m = 2 kg

h = 4 m

Substituting, we find its GPE:

$GPE=(2)(9.8)(4)=78.4 J$

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