Question

A 2 kilogram mass is lifted 4 meters above the ground what is the change it gravitational energy

Answer 1

Answer:

78.4 J

Explanation:

The gravitational potential energy of an object is the energy possessed by the object due to its location in the gravitational field.

The change in gravitational potential energy of an object is given by:

$\Delta U=mg\Delta h$

where:

m is the mass of the object

$g=9.8 m/s^2$ is the acceleration due to gravity

$\Delta h$ is the change in height of the object

For the mass in  this problem, we have:

m = 2 kg is the mass

$\Delta h = 4 m$ is the change in height

So, its change in gravitational energy is:

$\Delta U=(2)(9.8)(4)=78.4 J$