The gravitational potential energy of the object is 100 J.
Gravitational potential energy stored in an object is the work done in raising the object to a height h against the gravitational force acting on it.
The gravitational force acting on a body is its weight mg, where m is its mass and g, the acceleration due to gravity.
Work done by a force is equal to the product of the force and the displacement made by the point of application of the force.
[tex] GPE = mgh [/tex]
The weight of the object is given as 20 J and it is raised to a height of 5 m.
[tex] GPE =(mg)*h = (20 N)*(5m)=100 J [/tex]
The gravitational potential energy of the object is 100 J.
