WAEC - Physics (2013 - No. 2)

Which of the following units is equivalent to the watt?
kgms-2
kgm2s-3
kgm2s-2
kgm2s-1

Explanation

\(Power = \frac{\text{Work done}}{time}\)

= \(\frac{Force \times distance}{time}\)

= \(\frac{mass \times acceleration \times distance}{time}\)

= \(\frac{kg \times m \times m}{s^{2} \times s}\)

= \(kgm^{2} s^{-3}\)

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