Velocity of a ball in a new coordinate system.

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Homework Help Overview

The discussion revolves around understanding the velocity of a ball in a new coordinate system, with a focus on interpreting position vs time graphs and unit conversions.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants explore the need to convert coordinate systems and question the interpretation of the graphs as position vs time. There is also discussion about the relevance of the origin position and the angle between axes in determining the velocities.

Discussion Status

Some participants have provided insights into the problem, suggesting that the original poster should focus on understanding the velocities in the new coordinate system before addressing unit conversions. There appears to be a shared uncertainty regarding the correctness of attempts made by participants.

Contextual Notes

There is mention of unit conversion from meters per second to feet per second, and participants express confusion about their attempts and the results they obtained.

theBEAST
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Homework Statement


https://dl.dropbox.com/u/64325990/velocity%20of%20ball.PNG

The Attempt at a Solution


I was thinking I could just convert from metres to feet but turns out that's not the right answer. Am I suppose to change the coordinate systems so I get a distance vs time graph? I am really clueless about what to do here.
 
Last edited by a moderator:
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The problem seems to indicate that both systems are already position vs time graphs (aka velocity).

Before worrying about the unit conversion you should determine what velocities are seen by the new coordinate system.

The two things to consider are the origin position and the angle between the axes.

After you do that then convert the units from m/s to ft/s.
 
The problem seems to indicate that both systems are already position vs time graphs (aka velocity).

Before worrying about the unit conversion you should determine what velocities are seen by the new coordinate system.

The two things to consider are the origin position and the angle between the axes.

After you do that then convert the units from m/s to ft/s.
 
Alright well here is my attempt. But it is wrong as well :( Does anyone have an idea what I am doing wrong? Thanks!

https://dl.dropbox.com/u/64325990/Photobook/Photo%202012-08-23%202%2056%2026%20PM.jpg
 
Last edited by a moderator:
I'm not seeing anything wrong with what you did. I came up with the same answers so I don't know...
 
Bhumble said:
I'm not seeing anything wrong with what you did. I came up with the same answers so I don't know...

Hmmm, does anyone else get the same answer that we got?
 

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