# Homework Help: Polygon Of Forces To Demonstrate Equilibrium

1. Aug 17, 2011

### sperrya

1. The problem statement, all variables and given/known data
Use the polygon of forces to demonstrate that a 200 kg crate on a 25o incline is in equilibrium on the slope.

2. Relevant equations
See attached

3. The attempt at a solution
Please see attached for my attempt, I think I am in the right ball park, just need to know what seat to be in, i.e. how do I plot the answer to satisfy the question. Please help...

Thanks

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2. Aug 17, 2011

### SteamKing

Staff Emeritus
You must draw the force polygon so that the forces show the correct magnitude and direction. For instance, how must the weight vector of the box be drawn?

3. Aug 17, 2011

### sperrya

Hi there, thanks for your reply, I know I need to draw a force triangle of some sort, but unsure how to do it with the information I have. Even then, is this a correct polygon of force??

Thanks

4. Aug 17, 2011

### SteamKing

Staff Emeritus
What direction is the weight force usually drawn?