Resolving forces


by CathyLou
Tags: forces, resolving
CathyLou
CathyLou is offline
#1
Sep29-07, 11:57 AM
P: 173
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
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chaoseverlasting
chaoseverlasting is offline
#2
Sep29-07, 12:56 PM
P: 1,017
Do you know the triangle law of vector addition? Use it. You have the angles, and the magnitudes...
CathyLou
CathyLou is offline
#3
Sep29-07, 02:32 PM
P: 173
Quote Quote by chaoseverlasting View Post
Do you know the triangle law of vector addition? Use it. You have the angles, and the magnitudes...
Thanks for your help.

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

Cathy

learningphysics
learningphysics is offline
#4
Sep29-07, 09:07 PM
HW Helper
P: 4,125

Resolving forces


divide the forces into horizontal and vertical components...

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


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