(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A triangular body changes orientation as the suspporting links rotate. At the moment shown, theta = 90 deg, theta_dot = 5 rad/s, and beta = 45 deg. Determine vA and the angular velocity of the triangular body.

rB/C = 2jcm and rB/A = 5icm

Points E and D are fixed. theta is the angle made between horizontal and BE. beta is angle made between horizontal and AD.

2. Relevant equations

vB = vE + w x rB/E

vB = vA + w x rB/A

3. The attempt at a solution

vB=vE + w x rB/E

vB=0 + 5kx 2[]j[/b]

vB=-10i

vB=vA + w x rB/A

-10i= vA + w x 5j

I am stuck at this point because I am not sure if I should use theta_dot for this w because AD is at a different angle (beta). And if I do need to use a different w (which would be beta_dot how would I find it without knowing the length of AD.

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# Homework Help: Relative velocities of rigid bodies

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