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Q: Find the potential energy of an object mass m raised from the ground level at a height of 4h-
  • A. 4 mgh
  • B. 8 mgh
  • C. 0.4 mgh
  • D. ¼ mgh
Correct Answer: Option A - From, (P.E.) = mgh' = mg(4h) ( ∵ h ' = 4h) = 4 mgh
A. From, (P.E.) = mgh' = mg(4h) ( ∵ h ' = 4h) = 4 mgh

Explanations:

From, (P.E.) = mgh' = mg(4h) ( ∵ h ' = 4h) = 4 mgh