Deriving an equation through a free body diagram

  • Thread starter xgdoyo
  • Start date
  • #1
2
0

Homework Statement


Use a Free body diagram to show that :Tanθ=static friction, on an incline plane


Homework Equations



FF/FN= coeficiant of friction

The Attempt at a Solution


I know I must get an angle to have a tan of the Force of friction and a Normal force, but I don't understant why i need the the angle
 

Answers and Replies

  • #2
BruceW
Homework Helper
3,611
120
You should draw out the free body diagram (since that's what the question asks) and that's usually the best way to go about solving these kinds of questions anyway.

What was the actual question? It would make more sense if it asked you to show that:
[tex]tan(\theta) \leq \mu_s [/tex]
(where [itex]\mu_s[/itex] is the coefficient of static friction). And remember that the friction force can be less than its maximum possible value, which is why there is an inequality sign.
 

Related Threads on Deriving an equation through a free body diagram

  • Last Post
Replies
8
Views
3K
  • Last Post
Replies
4
Views
1K
  • Last Post
Replies
15
Views
11K
  • Last Post
Replies
12
Views
2K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
5
Views
7K
  • Last Post
Replies
2
Views
10K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
1
Views
3K
  • Last Post
Replies
3
Views
1K
Top