Resolving Forces: Find Magnitude & Angle w/ Ox

AI Thread Summary
To resolve the forces acting on a particle at point O, it is essential to accurately draw the force diagram and label the forces correctly. The forces P, Q, R, and S have specific magnitudes and angles with respect to the Ox axis, which must be converted into horizontal and vertical components for proper calculation. The triangle law of vector addition can be applied to find the resultant force's magnitude and direction. Clarification on how to interpret the angles measured anticlockwise is also necessary for accurate results. Understanding these concepts will lead to the correct determination of the resultant force and its angle with the Ox axis.
CathyLou
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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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Do you know the triangle law of vector addition? Use it. You have the angles, and the magnitudes...
 
chaoseverlasting said:
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
 
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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