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

Friction compared to applied force

  • Thread starter Shanetm
  • Start date
  • #1
9
0

Homework Statement



I am doing review questions about friction and am I little confused about the one I am currently doing. I have an idea of what the answer is but i want to be positive.

The question asks to compare friction to applied force of an object on a horzontal surface. Compare them when the object is slowing down, travelling at a constant velocity and speeding up

The Attempt at a Solution



I have the answers as both will decrease, both will stay the same and both will increase but I feel like this may not be correct. Help would be appreciated.
 

Answers and Replies

  • #2
BruceW
Homework Helper
3,611
119
Well the friction is usually modelled as a function of speed (either linear or as speed squared). So you are right about how friction will act in those situations.

But the applied force is a bit more complicated. I think you'd need to write down a model of the friction force and the applied force and work it out. (In other words, I don't think there is a general answer)
 

Related Threads on Friction compared to applied force

Replies
1
Views
553
Replies
3
Views
3K
Replies
2
Views
335
Replies
8
Views
3K
Replies
2
Views
1K
Replies
0
Views
1K
Replies
6
Views
6K
Replies
5
Views
8K
Replies
3
Views
735
  • Last Post
Replies
13
Views
3K
Top