Massless particle revolving in a circle

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Homework Help Overview

The discussion revolves around a massless particle revolving in a circle, with a given rotational velocity expressed as (2+sin(a)). Participants are trying to determine the correct expression for the Y-axis acceleration of the particle.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants present two methods for calculating Y-axis acceleration and seek clarification on which is correct. Questions arise regarding the meaning of the rotational velocity and the definition of "Y-axis" acceleration, particularly whether it refers to the y-component of acceleration in the xy-plane.

Discussion Status

The discussion is ongoing, with participants questioning the definitions and assumptions related to the problem. Some have requested the original problem statement for clarity, indicating a lack of consensus on the interpretation of the terms used.

Contextual Notes

There is uncertainty regarding the angle 'a' in the context of the problem, as well as the specific setup of the circular motion in relation to the coordinate axes.

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Given: A massless particle revolving in a circle with a rotational velocity = (2+sin(a))
To Find: Y-axis acceleration
Method #1 (from rotational acceleration)
Y-axis acceleration = (2+sin(a))(cos(a))^2
Method #2 (from Y-axis velocity)
Y-axis acceleration = (2+sin(a))(cos(a))^2-(sin(a))(2+sin(a))

Which Y-axis acceleration is correct and why?

Can someone explain this?
 
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rotational velocity = (2+sin(a))
What does this mean? Is a an angle? If so what angle?
And what do you mean by "y-axis" acceleration? Are we to assume that the circle is in the xy-plane and you are looking for the y-component of acceleration?
 
HallsofIvy said:
What does this mean? Is a an angle? If so what angle?
And what do you mean by "y-axis" acceleration? Are we to assume that the circle is in the xy-plane and you are looking for the y-component of acceleration?

You tell me. I have no clue what they are asking. :cry:
 
Post the problem EXACTLY as it appears in your text/homework. Attach any pictures that come with the problem (or describe them).
 

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