Rotational Motion, angular velocity

  • Thread starter jimla
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  • #1
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Homework Statement



Two people are on a ride where the inside cars rotate at constant angular velocity three
times the constant angular velocity of the outer cars. If the two cars are in line at t = 0,
and moving at 3ω and ω respectively, at what time will they next pass each other?

The Attempt at a Solution



The answer is π/ω but I can't figure out how to get there!! Please help!!!!
 

Answers and Replies

  • #2
1,065
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Homework Statement



Two people are on a ride where the inside cars rotate at constant angular velocity three
times the constant angular velocity of the outer cars. If the two cars are in line at t = 0,
and moving at 3ω and ω respectively, at what time will they next pass each other?

The Attempt at a Solution



The answer is π/ω but I can't figure out how to get there!! Please help!!!!

What variable n represent?

Look at the clock at noon when the hour and minute hand are at top of each other. When will the next when the minute hand pass hour hand?
 
Last edited:
  • #3
What variable n represent?
I think it is "pi".
 
  • #4
1,065
10
thanks. Old eyes need reading glasses.
 
  • #5
881
40
The answer is π/ω but I can't figure out how to get there!! Please help!!!!

Do tell us how you tried it out, its much easier to help then :smile:

As a basic hint, think about the relative angular velocity of the two objects.
 
  • #6
tiny-tim
Science Advisor
Homework Helper
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welcome to pf!

hi jimla! welcome to pf! :wink:
If the two cars are in line at t = 0,
and moving at 3ω and ω respectively …

ok, now translate that into (two) equations

what do you get? :smile:
 

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