Question

An object of mass 12kg is at a certain height above the ground. If the potential energy of the object is 480J, find the height at which the object is with respect to the ground. (g=10m/s2)​

Answer 1

Explanation:

0.2 metre .......,.............

Answer 2

Answer:

An object of mass 12kg is at a certain height above the ground. If the potential energy of the object is 480 J, the height of the object with respect to the ground is $4m$

Explanation:

• Potential energy is the energy stored in an object, the gravitational potential energy is due to the height of the object with respect to another body

• For a body of mass, 'm' situated at a height 'h' from the ground on the earth the gravitational potential energy is

      $PE=mgh$

where the acceleration due to gravity $g=10m/s^{2}$

From the question, we have

mass of the object $m=12kg$

the potential energy of the object $PE=480J$

so the height of the object from the ground $h=PE/mg$

$h=\frac{480}{12*10}=4m$