Calculate Average Power: 60kg Woman Running Up 4m Stairs in 6s

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Homework Help Overview

The discussion revolves around calculating the average power exerted by a woman running up a flight of stairs, specifically involving a mass of 60 kg, a height of 4 m, and a time of 6 s. Participants are exploring the relevant equations and concepts related to power and work in the context of physics.

Discussion Character

  • Exploratory, Mathematical reasoning, Assumption checking

Approaches and Questions Raised

  • Participants express uncertainty about the equations needed to solve the problem and seek assistance. Some attempt to derive the power from the work done, while others question the calculations and the application of formulas.

Discussion Status

The discussion includes attempts to calculate the work done and the average power, with some participants providing calculations and others questioning the accuracy of those calculations. There is acknowledgment of errors in the arithmetic, but no consensus on the final answer has been reached.

Contextual Notes

Participants are working within the constraints of homework guidelines, which may limit the sharing of complete solutions. There is a focus on understanding the underlying physics concepts rather than simply arriving at an answer.

wakejosh
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not sure how to solve this, having trouble finding the equation I need in my book. any help is appreciated. thanks in advance.

A 60 kg woman runs up a flight of stairs having a rise of 4.0 m in
a time of 6.0 s. What
average power did she supply?
 
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wakejosh said:
not sure how to solve this, having trouble finding the equation I need in my book. any help is appreciated. thanks in advance.

A 60 kg woman runs up a flight of stairs having a rise of 4.0 m in
a time of 6.0 s. What
average power did she supply?
Find the equation for power, and work back from that.
 
and another one:

A horizontal force of 100 N is applied to move a 45 kg cart across
a 9.0 m level surface.
What amount of work is done by the 100 N force?


now with this one do I just do 100 N * 9.0 M = 900 J ? is this correct?
 
geoffjb said:
Find the equation for power, and work back from that.

60kg * 9.8 m/s/s = 588 N
ok so 588 N * 4 m = 5352 J

2352/6 s = 392 Watts

pretty sure that's it. am i right?
 
wakejosh said:
60kg * 9.8 m/s/s = 588 N
ok so 588 N * 4 m = 5352 J

2352/6 s = 392 Watts

pretty sure that's it. am i right?

You're right, except for mixing up the numbers. 588*4 = 2352. :smile:
 
yea.. that was a typo. thanks.
 

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