The gravitational potential energy of an object can be calculated using the formula:
Gravitational Potential Energy = mass × gravity × height
In this case, the mass of the object is 4 kg and the height is 3 m. The value of gravity on Earth is approximately 9.8 m/s².
Plugging in these values into the formula, we have:
Gravitational Potential Energy = 4 kg × 9.8 m/s² × 3 m
Calculating the expression:
Gravitational Potential Energy = 117.6 joules
Therefore, the object's gravitational potential energy is 117.6 joules.