Instant center of Velocity (check if I did it correctly)

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AI Thread Summary
The discussion focuses on calculating the velocities and angular velocities of points B, C, and D in a mechanical system, with point C having a downward velocity of 0.2 m/s. Participants emphasize the importance of using the correct distances for calculations, particularly for vD and ωAB. There is a correction regarding the direction of vD, with a suggestion to clarify its representation in the diagram. The use of relative velocity to determine vD is mentioned, and an assumption is made regarding its angle. The conversation highlights the need for accuracy in both calculations and directional representations in the context of the problem.
SagarPatil
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Homework Statement


Velocity of point C = 0.2 m/s going down
Find VB, VD, Angular velocity of BCD and Angular Velocity of AB

Homework Equations


V=wr
Sine and cosine law

The Attempt at a Solution



Drawing of the question

Please note that BCD is one link (L shape)
 
Last edited:
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Your work looks good except for your calculation of vD at the end of your notes. Did you use the correct distance?

Also, did you use the correct distance, r, when calculating ωAB?

Also, since the question asks for velocities rather than speeds, you might need to include directions for the velocities.
 
Looks right to me

Ah, I see I didst use the correct radius. Thanks!

Yea, I will put the direction in the end
 
Are you using the center of rotation of CBD to find vD?

Your red arrow representing the direction of vD is incorrect.
 
TSny said:
Are you using the center of rotation of CBD to find vD?

Your red arrow representing the direction of vD is incorrect.

ok, so I am using the relative velocity to find VD.

The red arrow for vd is Vd/B

Vd is at point D going left an angle of 45 degree (assuming)
 

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