Answer :
Final answer:
The potential energy of the fridge located 320m above the ground is calculated using the formula for gravitational potential energy. Given the mass (84kg) and the height (320m), the potential energy is approximately 263,424 Joules.
Explanation:
To calculate the potential energy of an object, we use the formula for gravitational potential energy which is PE = mgh, where m is the mass of the object, g is the gravitational constant (9.8 m/s²), and h is the height above the ground.
Given that the mass of the refrigerator is 84kg and it is located 320m above the ground, we can substitute these values into the formula.
Therefore, the potential energy PE = (84 kg) * (9.8 m/s²) * (320 m), which equals 263,424 Joules (rounded to nearest whole Joule). Thus, this is the potential energy of the refrigerator on the 70th floor of the skyscraper.
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