Power mechanics physics problem

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Homework Help Overview

The problem involves a physics scenario where a student climbs a rope, and the objective is to determine the average speed required to match a specific power output. The subject area is power mechanics, focusing on concepts of work, energy, and power in the context of motion.

Discussion Character

  • Exploratory, Mathematical reasoning, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the calculation of work done in climbing the rope and the relationship between work, power, and time. There are attempts to derive the average speed based on given power output and height climbed.

Discussion Status

Some participants have provided calculations related to work and power, while others are exploring the implications of these calculations on average speed. There is an ongoing exchange of ideas, but no explicit consensus has been reached regarding the final approach.

Contextual Notes

Participants are working within the constraints of a homework assignment, which may limit the information available or the methods they can use. The problem setup includes specific values for mass, height, and power output, but further clarification on assumptions may be needed.

-Aladdin-
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A 50kg student climbs a 5.0m long rope and stops at the top.What must her average speed be in order to match the power output of 200w.
a)0.20m/s
b)0.41m/s
c)0.10m/s

My Work :
And stops at the top => v=0 and h=5m so I'll use mgh.
Now power output = variation of energy/1

But average means the variation of x /variation in time.

Any help will be great,
Thanks
 
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How much work does she have to do to climb the rope? In what time must she complete the climb to have her average power equal 200 W?
 


Doc Al said:
How much work does she have to do to climb the rope? In what time must she complete the climb to have her average power equal 200 W?

Work = mgh , where h=5

Power = Work/time

time = Work / power

Average speed = 5 / time(gotten) ?
 


Sounds good to me.
 

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