Calculating the speed of an object

  • Thread starter Nal101
  • Start date
  • #1
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Homework Statement


If the radius of a merry-go-round is 11 meters, and it takes 15 seconds to go around once, what is the speed of an atom at the outer rim?



Homework Equations


C = 2 [tex]\pi[/tex] r
v = m / s


The Attempt at a Solution



C = 3.14 * 22
(gives distance traveled, 1 trip)
Multiply by 2 (i.e. 2 trips as indicated by problem)
divide by the time, 15s
Answer was told to be wrong, I thought it rather simple, did I make a calculation error somewhere?
 

Answers and Replies

  • #2
rock.freak667
Homework Helper
6,223
31

Homework Statement


and it takes 15 seconds to go around once


so what is the time period? What is the angular velocity when you get that?
 
  • #3
DaveC426913
Gold Member
19,917
3,167
Multiply by 2 (i.e. 2 trips as indicated by problem)
Where does it say this?
 

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