Pilot averages 190W over distance. Mass, time, power given. find H

  • Thread starter lolbob07
  • Start date
  • #1
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Homework Statement


In 1979 the human powered Gossamer Albatross flew across the English Channel. The pedalling pilot averaged 190 W over the distance. If the pilot's power was used to lift a 110 kg mass, to what height would he lift the mass in a time of 25 s?


Homework Equations


P = W/T
W=FxD


The Attempt at a Solution


All I am looking for is the formula to solve this question.
P = 190 J/S
M = 110 kg
Time = 25 s

How to find the height?
 

Answers and Replies

  • #2
andrevdh
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How much work would he have done during this period?
Lifting a mass up ... what happens to its energy?
 
  • #3
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How much work would he have done during this period?
Lifting a mass up ... what happens to its energy?
Work = F x D


F=mg
F=110 x 9.8
F=1078 N

But how do we find the distance?
 
  • #4
olivermsun
Science Advisor
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190 W is a quantity of power. Check out the definition (and units) of power.
 
  • #5
andrevdh
Homework Helper
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Use the power rating to calculate the amount of work that the pilot will do during the stated period of time.
 
  • #6
CWatters
Science Advisor
Homework Helper
Gold Member
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Instead of W=FD think about W=mgh
 

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