Final answer:
The potential energy of an object weighing 30 kg at a height of 5 m, with gravity at 10 m/s², is calculated using the formula PE = mgh, which equals 1500 J.
Step-by-step explanation:
The potential energy (PE) of an object can be calculated using the formula PE = mgh, where 'm' is the mass of the object, 'g' is the acceleration due to gravity, and 'h' is the height above the ground. In this case, with an object weighing 30 kg at a height of 5 meters and gravity (g) set to 10 m/s², the potential energy is calculated as follows: PE = mgh = 30 kg × 10 m/s² × 5 m = 1500 J Therefore, the correct answer is B) 1500 J.