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Q: An object of mass 12kg is placed at a certain height from the ground. If the potential energy of the object is 480J, find the height from the ground of an object ?
  • A. 6m
  • B. 5m
  • C. 4m
  • D. 8m
Correct Answer: Option C - Here, m = 12 kg, PE = 480 J, g = 10 m/s² P = mgh 480 = mgh 480 = 12 x 10 x h h = 4 m
C. Here, m = 12 kg, PE = 480 J, g = 10 m/s² P = mgh 480 = mgh 480 = 12 x 10 x h h = 4 m

Explanations:

Here, m = 12 kg, PE = 480 J, g = 10 m/s² P = mgh 480 = mgh 480 = 12 x 10 x h h = 4 m