# Banked Circular Highway Curve? Find friction

1. Oct 3, 2004

A banked circular highway curve is designed for traffic moving at 65 km/h. The radius of the curve is 230 m. Traffic is moving along the highway at 35 km/h on a rainy day. What is the minimum coefficient of friction between tires and road that will allow cars to negotiate the turn without sliding off the road?

I've figured out an angle which equals close to 20 degrees but from there I have no clue what to do. Any Help?

2. Oct 3, 2004

### HobieDude16

yeah, same question, i have a feeling a lot of uf people are visitin this site!

3. Oct 3, 2004

Thomas Hall

4. Oct 3, 2004

### HobieDude16

really? wow, i live in gainesville place.... but yeah, this crap is making me angry... we're trying though

5. Oct 3, 2004

### HobieDude16

my bro's gf who is here lives in sled hall....

6. Oct 3, 2004

### Gokul43201

Staff Emeritus
How did you get the angle ? Did you draw a free body diagram ?

Resolve all the forces along a pair of directions, and use the condition that there should be not resultant force (in either direction), or else the car will slip.

7. Oct 3, 2004

### HobieDude16

so have any of you uf people done any of the other problems on part 3? (of the 3 that are due tonight?) cause thats where we're strugglin the most, weve gotten almost all of the other 2 sections.... we have one more on each section... (the ant and the abc blocks with pullies)

8. Oct 3, 2004

### 0aNoMaLi7

im over in Murphree Hall (near Fletcher)

9. Oct 3, 2004

i got an answer of .14 and it's wrong

10. Oct 3, 2004

### HobieDude16

you have an aol name ginger?

11. Oct 3, 2004

### greenman100

hey, I need help here too, it's the only one I can't get

12. Oct 3, 2004

### Gokul43201

Staff Emeritus
Show how you got that. We'll tell you what's wrong.

13. Oct 3, 2004

### HobieDude16

you have an aol screen name greenman?

14. Oct 3, 2004

### vsage

Is 0.104 correct? (assuming it's online). Edit no I don't use AIM. I used to have it until I found out it was attached to Weatherbug and other such annoying malwares.

Last edited by a moderator: Oct 3, 2004
15. Oct 3, 2004

### HobieDude16

you have a aol name vsage?

16. Oct 3, 2004

yes! how did you do it?

17. Oct 3, 2004

### greenman100

yeah, greenman100

18. Oct 3, 2004

### greenman100

UF guys, look at page 129, that will get you an angle

19. Oct 3, 2004

### HobieDude16

its for 2048, lol

20. Oct 3, 2004

### HobieDude16

that didnt work for us? the explanation you gave us vsage....