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Physics help with efficiency

  • Thread starter tysajdak
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  • #1
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Homework Statement


I am using a 5 kilowatt motor to pump oil to a holding tank which is 20 m above the pump. If the motor is 65% efficient, how many liters of oil can i pump per minute if 1 liter of oil has a mass of 1.30 kg?


Homework Equations


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The Attempt at a Solution


???
 

Answers and Replies

  • #2
rock.freak667
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The Attempt at a Solution


???
Well if the efficiency is 65% how much is the work output of the motor?
 
  • #3
SteamKing
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How much energy does it take to lift 1 liter of oil 20 meters? After accounting for the efficiency of the motor, how much energy per minute is furnished to the pump?
 

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