What is the centripetal acceleration of the end of the rod?

AI Thread Summary
The discussion revolves around calculating the centripetal acceleration of the end of a rotating rod, which is 15.3 cm long, given a rotary speed of 2010 m/s. Participants debate whether this speed refers to angular velocity or tangential velocity, with confusion about the rod's rotation point—whether it rotates about the middle or the end. Clarification is sought on the appropriate radius to use in calculations, with suggestions to use 7.65 cm for the radius if rotating about the middle. Ultimately, one participant decides to confirm the details with their teacher after exploring both interpretations. The conversation highlights the importance of understanding the distinction between angular and tangential velocity in physics problems.
Heidikins07
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Here is the homework question...

According to the Guinness Book of World Records, the highest rotary speed ever attained was 2010m/s(4500mph). The rotating rod was 15.3cm(6in.) long. Assume the speed quoted is that of the end of the rod. What is the centripetal acceleration of the end of the rod?

So I think since they say rotary speed they are talking about angular velocity here. so i would say angular velocity (w) = 2010m/s. Is this correct? or is it tangential velocity (v) = 2010m/s?



okay...does this mean it's rotating about the middle or about the end? (diameter being 15.3 radius being 7.65) orrrrrr (radius being 15.3 and diameter being 30.6) ??
 
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Heidikins07 said:
So I think since they say rotary speed they are talking about angular velocity here. so i would say angular velocity (w) = 2010m/s. Is this correct? or is it tangential velocity (v) = 2010m/s?
What is the SI unit of angular speed?


okay...does this mean it's rotating about the middle or about the end? (diameter being 15.3 radius being 7.65) orrrrrr (radius being 15.3 and diameter being 30.6) ??

Well, nothing has been stated specifically. If this written homework, you could check with your teacher. If this is one of those computerised tests, which gives you three chances at the right answer, then use 15.3 cm as the radius in your first try.
 
yea, it's written homework. so i did it both ways and I am just gunna ask my teacher! thanks tho! Ü
 

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