What is the gravitational potential energy of a 65.7 kg person standing on the roof of a 135 meter building?

For the purpose we will use the following equation for potential energy:

U = m * g * h

In the above equation, m represents the mass of the object, h represents the height of the object and g represents the gravitational field strength (9.8 N/kg on Earth).

When we plug values into the equation, we get following:

U = 65.7kg * 9.8 N/kg * 135m = 86921.1 J = 86.92 kJ