Moment of Inertia of Disk with Off-Center Hole

  • Thread starter Thread starter Quartz
  • Start date Start date
AI Thread Summary
The discussion focuses on calculating the moment of inertia of a cylindrical disk with an off-center hole. The approach involves treating the disk as a solid object and then subtracting the moment of inertia of the hole using the parallel-axis theorem. Participants emphasize the importance of demonstrating prior effort in solving the problem before receiving assistance. The conversation also suggests that this topic is more suited for a homework help forum. Understanding the application of these principles is crucial for accurate calculations in mechanical contexts.
Quartz
Messages
5
Reaction score
0
A curcial part of a piece of machinery starts as a flat uniform cylindrical disk of radius R0 and mass M. It then has a circular hole of radius R1 drilled into it. The hole's center is a distance h from the center of the disk. Find the moment of inertia of this disk (with off-center hole) when rotated about its center, C.

Hint: Consider a solid disk and subtract the hole; use parallel-axis theorem.
 
Physics news on Phys.org
firstly.. for all that i know, this is a post that belongs in the 'Homework and Help forum'. Secondly, you need to show some efforts from your side in solving this problem before we can provide you any help with this question.
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

Moment of inertia of a disk about an axis not passing through its CoM
Replies
11
Views
3K
Find the moment of inertia of this disk
Replies
2
Views
5K
Why is electric field at the center of a charged disk not zero?
Replies
4
Views
3K
How Do You Calculate the Moment of Inertia for a Disk with a Central Hole?
Replies
2
Views
3K
Rotational Inertia: Hoop vs Disk
Replies
19
Views
3K
Parallel Axis Theorem Not Working
Replies
28
Views
1K
Moment of inertia about center of mass with four holes?
Replies
9
Views
7K
What is the "r" in the moment of inertia?
Replies
13
Views
2K
Moment of Inertia of an inclined disk
Replies
27
Views
5K
Determining $L_{o}$: Finding Angular Momentum of System
Replies
45
Views
4K

Hot Threads

Recent Insights

Back
Top