Do the solutions have an error linear+rotational motion of a rigid body

Click For Summary

Homework Help Overview

The discussion revolves around a problem in mechanics, specifically focusing on the linear and rotational motion of a rigid body. Participants are examining the correctness of solutions provided in a solution manual related to the problem.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants are questioning the assumptions regarding the motion of points A and B, particularly whether they are in uniform circular motion about a specific point. There is also a discussion about the definition of rotational speed and its application to the problem.

Discussion Status

The discussion is ongoing, with some participants expressing doubts about the solution manual's accuracy while others are clarifying their understanding of the problem's setup. There is no explicit consensus yet, but various interpretations are being explored.

Contextual Notes

Some participants note the absence of the original problem text, which may be contributing to misunderstandings or differing interpretations of the problem.

Physics news on Phys.org
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?
 
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...
 
Looks correct to me.

What does the solution manual say?
 
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.
 
Femme_physics said:
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...
It would be helpful if, in the future, you gave the text of the problem.
 
Ah but there was none :P
 
That would explain that.
 

Similar threads

Rotation of Rigid Bodies: Rotating stick with disc on top
  • · Replies 9 ·
Replies
9
Views
3K
Moment of inertia of a rigid body
  • · Replies 9 ·
Replies
9
Views
2K
What is the speed of sound in a rigid body?
  • · Replies 23 ·
Replies
23
Views
6K
Graduate Rigid body motion (RBM) transformation
  • · Replies 3 ·
Replies
3
Views
1K
Rotation of a Body: Frictional Force w/o Slipping
  • · Replies 8 ·
Replies
8
Views
1K
Moment of inertia rigid body problem
  • · Replies 38 ·
2
Replies
38
Views
5K
Proving things for an arbitrary rigid body with an axis of symmetry
  • · Replies 4 ·
Replies
4
Views
4K
How Do Particles Relate to Rigid Bodies in Different Scientific Contexts?
  • · Replies 3 ·
Replies
3
Views
16K
Predict the position of a particle on a rigid body
  • · Replies 8 ·
Replies
8
Views
2K
Rate of Rotation for a Pulley (Question for a Reasoning/Thinking Skills Test)
  • · Replies 3 ·
Replies
3
Views
4K