Analytical Vector methods for a four bar linkage

AI Thread Summary
The discussion revolves around solving a four-bar linkage problem with given dimensions and an initial angle. The user expresses uncertainty about using the equations provided, as they only know one angle (theta1). They have attempted to substitute values into the equations but are unsure how to proceed without additional angle information. The user also requests visual aids, such as a diagram of the linkage, to better understand the problem. The need for clarification on the equations and further assistance is emphasized.
painkiller72
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Homework Statement


In a four bar linkage r0=30mm, r1=10mm, r2=35mm, r3=20mm and theta1=45 degrees. Calculate theta2, theta3, Vc, W2, and W3 assuming that W1=30 rad/s ccw.


Homework Equations


R1*costheta1 + R2*costheta2 - R3*costheta3 - R0*costheta0 = 0 (3-x)
R1*sintheta1 + R2*sintheta2 - R3*sintheta3 - R0*sintheta0 = 0



The Attempt at a Solution


I wasn't sure about this equation from the start since I think it relies on knowing two angles and I only know one.
I first plugged in for
10*cos45+35*costheta2-20*costheta3-30*costheta0
10*sin45+35*sintheta2-20*sintheta3-30*sintheta0
equals
5.252+35*costheta2-20*costheta3-30*costheta0
8.509+35*sintheta2-20*sintheta3-30*sintheta0

and I'm already wondering what I should do from here.
 
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A picture of the linkage would be nice.
 

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