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

User Thomas Witt
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F = mg = 400 N, d = 30 m, t = 120 s
Power (P) = [Force (F) × distance (d)] ÷ t

P = ((F * d))/(t) = ((400 * 30))/(120) \\ = ((400 * 1))/(40) = ((10))/(1) \\ P = 10 \: ((Nm)/(s)) \: or \: watts
User LucasF
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