The joule is equivalent to?
PHYSICS
WAEC 2022
The joule is equivalent to?
- A. Kg m\(^{2}\) s\(^{-1}\)
- B. Kg\(^{2}\) m s\(^{-2}\)
- C. Kg m\(^{2}\) s\(^{-2}\)
- D. Kg m s\(^{-1}\)
Correct Answer: C. Kg m\(^{2}\) s\(^{-2}\)
Explanation
Joule as the unit of work done or energy used.
Force = mass × acceleration
Work = Force × Distance
Work = mass x acceleration x distance
Joule = kg × \(\frac{m}{s^2}\) × m
→ kg m\(^2\) s\(^{-2}\)
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