A 75 kg refrigerator is located on the 70th floor of a skyscraper (300 m above the ground). What is the potential energy of the refrigerator? (gravity constant = 9.8 m/s2)
or nah?!
+8581 Potential energy = (mass) x (gravity) x (height above the reference)
Relative to the 70th floor, on which the refrigerator is standing,
PE = (75 kg) x (9.8 m/s²) x (0) = 0 joules .
Relative to the 35th floor, halfway up to where the fridge is standing,
PE = (75 kg) x (9.8 m/s²) x (150 m) = 110,250 joules .
Relative to the ground,
PE = (75 kg) x (9.8 m/s²) x (300 m) = 220,500 joules .
+8581 Potential energy = (mass) x (gravity) x (height above the reference)
Relative to the 70th floor, on which the refrigerator is standing,
PE = (75 kg) x (9.8 m/s²) x (0) = 0 joules .
Relative to the 35th floor, halfway up to where the fridge is standing,
PE = (75 kg) x (9.8 m/s²) x (150 m) = 110,250 joules .
Relative to the ground,
PE = (75 kg) x (9.8 m/s²) x (300 m) = 220,500 joules .
