Force Components: Motion on xy-Plane, Non-Conservative Force

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Homework Help Overview

The discussion revolves around a problem involving the motion of an object on the xy-plane and the characterization of a force defined by its x and y components, specifically Fx= (3N/m)y and Fy= 0, in terms of whether it is conservative or not.

Discussion Character

  • Conceptual clarification, Assumption checking, Mixed

Approaches and Questions Raised

  • Participants explore the definition of a conservative force and question whether the given force meets that definition. There are attempts to clarify the problem's context and the implications of the force's characteristics.

Discussion Status

The discussion is ongoing, with participants expressing confusion about the problem's clarity and the nature of the force in question. Some have provided examples of conservative and non-conservative forces, while others are seeking a clearer definition and understanding of the conditions that classify a force as conservative.

Contextual Notes

There are indications that the problem may have been taken from a textbook that some participants find inadequate, which may contribute to the confusion surrounding the question.

chem engineer
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Consider the motion of an object on the xy-plane. Show that the force whose x and y- components are respectivley Fx= (3N/m)y and Fy= 0 is not conservative.
 
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I don't think you've stated the entire problem. What you said doesn't really make much sense.
 
chem engineer said:
Consider the motion of an object on the xy-plane. Show that the force whose x and y- components are respectivley Fx= (3N/m)y and Fy= 0 is not conservative.
What is the condition for a force to be conservative? Does this force meet that condition?
 
I can't make much sense of that either, however, a conservative force is a force that convserves mechanical work, so the force can not be "lost". For example gravitational force. If you have a ball and trow it down a building ( the building in physics haven in vacuum and stuff... ) and then put it back to the exact same point, the net work done by the gravitational force is 0. In consequence it does not matter if you shoot it to the moon in between, or how much other forces move it around. A non conservative force is friction for example.
 
Johannes said:
I can't make much sense of that either, however, a conservative force is a force that convserves mechanical work, so the force can not be "lost". For example gravitational force. If you have a ball and trow it down a building ( the building in physics haven in vacuum and stuff... ) and then put it back to the exact same point, the net work done by the gravitational force is 0. In consequence it does not matter if you shoot it to the moon in between, or how much other forces move it around. A non conservative force is friction for example.
DyslexicHobo said:
What you said doesn't really make much sense.
Even if the question was not copied verbatim, it is perfectly well posed and makes sense to me. In any case, the question is most definitely answerable.
 
chem engineer said:
Consider the motion of an object on the xy-plane. Show that the force whose x and y- components are respectivley Fx= (3N/m)y and Fy= 0 is not conservative.

This is exactly the same as asking to show that the differential, 3ydx, is not an "exact" differential. Of course, then it would be a math question!

So, back to you, chem engineer. What is the definition of "conservative" force. Then how does this force NOT satisfy that definition?
 
Its funny you guys said this question makee no sense, its copied directly from this terrible book my professor uses.
 
chem engineer said:
Its funny you guys said this question makee no sense, its copied directly from this terrible book my professor uses.
It's funny that all of us didn't say that:
Hootenanny said:
Even if the question was not copied verbatim, it is perfectly well posed and makes sense to me. In any case, the question is most definitely answerable.
It's also funny that you have failed to respond to our questions:
Hootenanny said:
What is the condition for a force to be conservative? Does this force meet that condition?
HallsofIvy said:
So, back to you, chem engineer. What is the definition of "conservative" force. Then how does this force NOT satisfy that definition?
 

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