Minimum speed at the circular track

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



What is the minimum speed of the car must have at the top of the loop? There are three methods. I would like to know which method or answer is correct.

Please see attached file.

Homework Equations



Please see attached file.


The Attempt at a Solution



Please see attached file.
 

Attachments

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Answers and Replies

  • #2
rock.freak667
Homework Helper
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I would choose the third one,provided that H> 2r.
 
  • #3
99
1
I would choose the third one,provided that H> 2r.

Thanks a lot. Why didn't consider the force at the top?
 
  • #4
rock.freak667
Homework Helper
6,223
31
I think if H> 2r, then the speed will be enough to provide the centripetal force.
 

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