Wheel Rotation: Vertical or Horizontal?

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SUMMARY

The discussion focuses on the motion of a hot splinter dislodged from a spinning grinding wheel, analyzing its trajectory based on the axis of rotation. When the axis is vertical, the splinter follows a path similar to that of a car wheel, while a horizontal axis results in a different motion pattern. Participants clarify the definitions of vertical and horizontal axes, emphasizing the importance of understanding tangential and centripetal acceleration in predicting the splinter's motion. The conversation concludes that drawing acceleration vectors can aid in visualizing the splinter's path.

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majstro
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Need some help with a problem here:

A hot splinter is dislodged from a spinning grinding wheel. Which of the paths drawn in figure best represent its subsequent motion, given that the axis of rotation is a) vertical b) horizontal ?

Heres is the picture for the q.:

http://img300.imageshack.us/my.php?image=wheeljm9.jpg
 
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Well, what do you think? Please show your thoughts on the question.
 
First, what do they mean with vertical/horizontal- axis?
 
The axis of the wheel on the example is pointing "into" the picture. Am i right?
 
could someone define horizontal/vertical-axis
 
majstro said:
The axis of the wheel on the example is pointing "into" the picture. Am i right?

I'd imagine that if the axis of rotation is horizontal, then you can take the axis going into the diagram. If the axis of rotation is vertical, imagine the wheel spinning about a veritcal line drawn down the wheel through the centre.
 
For part b) your drawing seems correct (as it will be rotating much like a wheel of a car, in ideal conditions)...so my suggestion is to draw the acceleration vectors for some point on the wheel and make my guess from their.

Remember there is a tangential and a centripetal acceleration...what does this mean?
 

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