It took 3.3 s for a student to move a 6.4 N chair a distance of 10.7 m. How much power did she use?

Question

Physics

Obie

4 September, 19:22

It took 3.3 s for a student to move a 6.4 N chair a distance of 10.7 m. How much power did she use?

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Answers (1)

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Sarah · Answer 1

= 20.75 Watts or 20.75 J/s

Explanation:

Power is given by the formula;

Power = work done/time

But; work done = Force * distance

Therefore;

Work done = 6.4 N * 10.7 m

= 68.48 Nm

Thus;

Power = 68.48 Nm / 3.3 s

= 20.75 Watts or 20.75 J/s