Which one of the following quantities CANNOT be used as a unit of potential energy?
Correct answer: C. gram.cm/s²
- A. watt second
- B. kg m²/s²
- C. gram.cm/s²
- D. ft lb
Explanation
Gram ·cm/s² is a unit of force (dyne), not energy. The others (W·s = J, kg·m²/s² = J, ft·lb are energy units). So option C cannot represent potential energy.
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