• Support PF! Buy your school textbooks, materials and every day products Here!

Find max. speed with Static Friction

  • Thread starter iLove
  • Start date
  • #1
2
0
Suppose the designated speed for the ramp is to be 13.2 m/s (29.5 mi/h) and the radius of the curve is 34 m.

The coefficient of static friction between the tires and the road is 0.33. What maximum speed could a car negotiate the exit ramp without skidding?


Vmax = square root of (µ(static) g r)

Vmax = Maximum velocity
g = Acceleration due to gravity (9.80 m/sec^2)
r = Radius of curve
µ = Coefficient of static friction

Vmax = 10.485 m/s

however, this answer wasn't right. what am i doing wrong? THANKS.
 

Answers and Replies

  • #2
tiny-tim
Science Advisor
Homework Helper
25,832
249
Welcome to PF!

Hi iLove! Welcome to PF! :smile:

Can you give us a little more information?

I can't quite picture this … is there a curve and an exit ramp, or are they the same thing?

And what is the relevance of the designated speed?

And I don't understand where g comes into it. :confused:
 
  • #3
2
0
Hi tiny-tim :)
No, there is no exit ramp, just a curve. But I already got the problem solved because it was due 25 minutes ago.

Thank you for making me feel welcomed ^^
 
  • #4
tiny-tim
Science Advisor
Homework Helper
25,832
249
Hi iLove! :smile:

I'm glad you solved it!

(you can mark it "SOLVED" by clicking on Thread Tools on the menu bar)

Do leave a bit more time next time … and remember, most of the people on this forum are asleep at this time of day! :zzz:
 

Related Threads for: Find max. speed with Static Friction

  • Last Post
Replies
7
Views
3K
Replies
5
Views
8K
Replies
9
Views
1K
Replies
1
Views
310
Replies
1
Views
25K
  • Last Post
Replies
3
Views
2K
Replies
8
Views
2K
Top