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Rotational Speed

  • Thread starter zombie4000
  • Start date
  • #1

Homework Statement


Tire with a radius of 40cm spinning at 2500 rev/min. What is the rotational speed?


Homework Equations


w=v/r
w=2500revmin/40cm
w=62.5 rad/sec

Does that sound right? I am confused
 

Answers and Replies

  • #2
2,017
85
Er... rev/min is a rotational speed.

Im not too sure what you are trying to work out.
 
  • #3
Okay. Thats the exact problem I have on my sheet. I asked a few others and they said that the rev/sec is the rotational speed.
 
  • #4
2,017
85
Look at your formula, and look at the units involved.

That will find a linear velocity at the outer edge of that ball, not rotational.
 
  • #5
Thanks for the help!
 

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