# Homework Help: Resolving forces

1. Sep 29, 2007

### CathyLou

Hi.

Could someone please show me how to draw the diagram for the following question as I am really stuck. I would really appreciate any help.

I have already drawn a diagram but must have labelled the forces incorrectly as my subsequent answers do not match the ones in the back of the textbook.

Forces P, Q, R and S act on a particle at O in the plane of the coordinate axes Ox, Oy, making angles p, q, r, s respectively with Ox, each angle being measured in the anticlockwise sense. Find the magnitude of the resultant and the angle it makes with Ox when:

(a) P = 2N, Q = 3N, R = 4N, S = 5N p = 0, q = 40, r = 100, s = 150

Thank you.

Cathy

2. Sep 29, 2007

### chaoseverlasting

Do you know the triangle law of vector addition? Use it. You have the angles, and the magnitudes...

3. Sep 29, 2007

### CathyLou

I'm not sure what the angles are from anticlockwise.

Cathy

4. Sep 29, 2007

### learningphysics

divide the forces into horizontal and vertical components...

what is the horizontal component of P? what is the vertical component of P?