 In this case, a simple expression for gravitational potential energy can be derived using the "W" = "Fd" equation for work, and the equation

The amount of gravitational potential energy held by an elevated object is equal to the work done against gravity in lifting it.The work done equals the force required to move it upward multiplied with the vertical distance it is moved (remember "W = Fd").The upward force required while moving at a constant velocity is equal to the weight, "mg", of an object, so the work done in lifting it through a height "h" is the product "mgh".