Calculating Average Power for a Ski Lift

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Homework Help Overview

The discussion revolves around calculating the average power required for a ski lift that raises multiple passengers to a certain height over a specified time. The subject area includes concepts from physics related to work, power, and forces.

Discussion Character

  • Exploratory, Mathematical reasoning, Assumption checking

Approaches and Questions Raised

  • Participants discuss the formula for average power and the calculations involved, with some questioning the correctness of their approach and results. There are attempts to clarify the relationship between force, work, and power, as well as the impact of multiplying by the number of passengers.

Discussion Status

The discussion is ongoing, with participants sharing their calculations and identifying potential errors. Some guidance is offered regarding the formulas used, but there is no explicit consensus on the correct approach or final answer.

Contextual Notes

Participants express confusion over their calculations and the interpretation of the problem, indicating a need for clarification on the setup and assumptions involved in the power calculation.

GingerBread27
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If a ski lift raises 100 passengers averaging 656 N in weight to a height of 145 m in 60 s, at constant speed, what average power is required of the force making the lift?

I know average power is P=W/t, where W is work and t is change in time. Since work is w=fd, I did 656 N*145 m and then took that number and multiplied it by 100 for the 100 passengers. I then took this product and divided it by the change in time, 60 seconds, and I got 158533 W for the average power, and it's wrong. Am I just misunderstanding the problem, or am I really doing this wrong?
 
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lol well the answer is wrong so I don't know. :mad:
 
Last edited:
I even tried not multiplying by 100 and it's wrong :cry:
 
ok, here's what you do...
P=(F)(V)
P=(W)(V)
P=(100)(656)(145/60)
thats how i did it
 
Oh gosh I was doing that and I wound up putting 1585.33 instead of 158533 lol dumb mistake good thing I got it :) Thanks
 

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