WAEC - Physics (2022 - No. 8)
The joule is equivalent to?
Kg m\(^{2}\) s\(^{-1}\)
Kg\(^{2}\) m s\(^{-2}\)
Kg m\(^{2}\) s\(^{-2}\)
Kg m s\(^{-1}\)
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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