Final answer:
The gravitational potential energy (GPE) of the paint can is approximately 127.6416 Joules.
Step-by-step explanation:
The gravitational potential energy (GPE) of an object can be calculated using the formula GPE = mgh, where m is the mass of the object, g is the acceleration due to gravity, and h is the height above a reference point.
In this case, the mass of the paint can is 7.3 kg and the height it is lifted is 1.78 m. We can use the formula to calculate the GPE:
GPE = (7.3 kg) * (9.8 m/s^2) * (1.78 m) = 127.6416 J.
Therefore, the gravitational potential energy of the paint can is approximately 127.6416 Joules.