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

Friction question

  • Thread starter Stevecgz
  • Start date
  • #1
68
0
A car is traveling at 50.0 mi/h on a horizontal highway. If the coefficient of static friction between road and tires on a rainy day is 0.100, what is the minimum distance in which the car will stop? What is the stopping distance when the surface is dry and the coefficient of static friction is 0.600?

I'm uncertain how to solve this question because the only relationships between the coefficient of friction and acceleration that I'm aware of require knowing the normal force, and this question does not give the normal force or the mass of the object so the normal force can be calculated.

Any guidance would be appreciated.

Steve
 

Answers and Replies

  • #2
Doc Al
Mentor
44,867
1,114
Don't give up so easily. Call the mass of the car "m" and see what happens. If information is not given, perhaps it's not needed. :wink:
 
  • #3
68
0
Figured out "m" cancels out in the equation. Got the correct answer now. Thanks Doc!

Steve
 

Related Threads for: Friction question

  • Last Post
Replies
3
Views
1K
  • Last Post
Replies
4
Views
1K
Replies
3
Views
863
  • Last Post
Replies
5
Views
2K
  • Last Post
Replies
12
Views
1K
  • Last Post
Replies
2
Views
641
  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
5
Views
871
Top