You transform 700 J of potential energy into kinetic energy to pull a wagon. If it took you 20 s to move the wagon, what was your power?

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11-04-2018
Physics

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You transform 700 J of potential energy into kinetic energy to pull a wagon. If it took you 20 s to move the wagon, what was your power?

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skyluke89 skyluke89 · Answer 1 · 2018-04-20T16:37:01+02:00

skyluke89 skyluke89

20-04-2018

The power is the work done W divided by the time t:
[tex]P= \frac{W}{t} [/tex]
In our problem, the work done corresponds to the potential energy converted into kinetic energy of motion of the wagon, so W=700 J, while the time is t=20 s, so the power is:
[tex]P= \frac{700 J}{20 s} =35 W[/tex]

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