Rotation and power problem, help

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Homework Help Overview

The problem involves lifting a bucket using a winch and calculating the necessary power and force. It is situated within the context of rotational dynamics and power calculations.

Discussion Character

  • Exploratory, Mathematical reasoning, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the calculations related to power and force, with one participant expressing confusion over their results compared to expected answers. There is an inquiry about the meaning of "module" in the context of the problem.

Discussion Status

Some participants are actively working through calculations, with one having resolved part (a) of the problem but struggling with part (b). There is a request for clarification on calculations and terminology, indicating a collaborative effort to understand the problem better.

Contextual Notes

Participants are encouraged to share their calculations to facilitate assistance, adhering to forum rules. There is an emphasis on ensuring clarity in the definitions used within the problem.

Cyannaca
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Hello, I would like it if anyone could help me with this problem

A bucket of 15 kg is lifted up from a well at a constant speed of 0,2 m/s. The cord rolls up around a winch (radius 0,03m). The winch is turned with a handle 0,4m of length
a) What power is necessary bring the bucket up?
b) If the force applied is always perpendicular to the handle, what is the module of the necessary force?

The answers are 29,4 W and 11 N and I don't know what is wrong but I always get 11,26 W :mad:
 
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What are your calculations?
 
I finally solved a (afer half an hour!) but now I really don't know how to do b
 
"module" means the same as "magnitude".
Does that help?
 
Welcome to the forums, Cyannaca!

Can you please post your calculations, so we can help find your error? Forum rules, plus it makes it much easier for everyone.
 
Ok, so I need to use Torque= radius*F* Thank you!
 

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