Vertical Circular Motion

  • Thread starter beckysamis
  • Start date
  • #1

Homework Statement



A 915kg car goes over a hill. If the radius of this curve is 43m, how fast must the car travel so that it exerts no force on the road at the crest.


Homework Equations



Fc = mv^2/r
Fg = mg


The Attempt at a Solution



Fc = Fn+Fg
Fn=Fg
Fg=mg
=(915)(9.81)
=8976.15
Fc=????
 

Answers and Replies

  • #2
Doc Al
Mentor
44,986
1,258
Fc = Fn+Fg
OK.
Fn=Fg
No. If there's no force on the road, what must Fn equal?
Fg=mg
=(915)(9.81)
=8976.15
OK.
 
  • #3
51
0
If the car must exert no force on the road at the crest, what does that say about the force the road must exert on the car at the crest? :)
 
  • #4
1,137
0

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