Potential energy per unit volume is given by
Correct answer: D. pgh
- A. mgh
- B. mgh/p
- C. gh
- D. pgh
Explanation
Potential energy per unit volume = (mgh) / volume = (ρVgh)/V = ρ g h (where ρ is density p). So option D (pgh) is correct.
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Work transfers energy when a force causes displacement, while kinetic energy, gravitational potential energy and power describe motion, position and the rate of energy transfer. The work-energy theorem links net work with change in kinetic energy, and efficiency accounts for energy losses rather than treating them as energy destruction.
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