# Homework Help: Do the solutions have an error linear+rotational motion of a rigid body

1. May 19, 2012

### Femme_physics

Last edited by a moderator: May 6, 2017
2. May 19, 2012

### tms

Maybe I don't understand the problem, but, assuming $\omega$ is in the plane of the paper, and assuming B is the unlabelled vertex, aren't A and B merely in uniform circular motion about O?

3. May 19, 2012

### Femme_physics

Omega is rotational speed. In our case the problem defines omega for shaft OA. B is just a point on a shaft. A and B are in uniform circular motion around a certain instantaneous axis of rotation. It's not "O". I'll try to get on a computer later so I can graph it...

4. May 19, 2012

### I like Serena

Looks correct to me.

What does the solution manual say?

5. May 20, 2012

### Femme_physics

Vb = 2.37 [m/s]

I just wanted to make sure I didn't forget the material since I'm suppose to teach some students about it. Seeing a wrong answer to mine made me lift an eyebrow, but I'm glad my suspicion was verified it's not my mistake.

6. May 23, 2012

### tms

It would be helpful if, in the future, you gave the text of the problem.

7. May 23, 2012

### Femme_physics

Ah but there was none :P

8. May 23, 2012

### tms

That would explain that.