Answer:
60 J
Explanation:
Potential Energy: This can be defined as the energy possessed by a body, due to its position. The S.I unit of potential energy is Joules. The Formula of potential energy is given as
Ep = mgh or
Ep = Wh ................ Equation 1
Where Ep = Potential energy of the box, W = Weight of the box, h = Height.
Given: W = 20 N, h = 3 m.
Substitute into equation 1
Ep = 20×3
Ep = 60 J.
Hence the gravitational potential energy of the box = 60 J
