Math Help - Forces question

1. Forces question

How would I go about doing this question:

http://i22.photobucket.com/albums/b3...Capture-14.png

Could I just make a triangle of forces and check the angles?

2. Re: Forces question

Originally Posted by jgv115
How would I go about doing this question:

http://i22.photobucket.com/albums/b3...Capture-14.png

Could I just make a triangle of forces and check the angles?
force triangle method works.
another way would be to resolve the forces along two orthogonal directions.

3. Re: Forces question

By Lamy's theorem there is no equilibrium in both cases
$\frac{P}{\sin\alpha}=\frac{Q}{\sin\beta}=\frac{R}{ \sin\gamma}$