Syd5678 Syd5678

05-03-2018
Mathematics

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A couch weighing 400 Newton’s is lifted 30 meters high in 120 seconds. How much power is used?

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budwilkins budwilkins

05-03-2018

F = mg = 400 N, d = 30 m, t = 120 s
Power (P) = [Force (F) × distance (d)] ÷ t
[tex]P = \frac{(F \times d)}{t} = \frac{(400 \times 30)}{120} \\ = \frac{(400 \times 1)}{40} = \frac{(10)}{1} \\ P = 10 \: (\frac{Nm}{s}) \: or \: watts[/tex]

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