What does moment of inertia depend on?

Click For Summary
Moment of inertia is commonly understood to depend on both the mass and shape of an object, but there is confusion regarding a statement made by Professor Lewin, who allegedly claims it does not depend on mass. Participants in the discussion clarify that he does not explicitly mention "moment of inertia" in his video, and his focus is more on acceleration rather than mass. Some users express frustration over the perceived waste of time in watching the video without clear answers. The conversation suggests that the thread may no longer serve a productive purpose and could be closed. Overall, the discussion highlights misunderstandings about the relationship between mass, shape, and moment of inertia.
avito009
Messages
184
Reaction score
4
I thought moment of inertia depends on mass of the object and also its shape. But prof Lewin says it doesn't depend on mass. See this video:
 
Physics news on Phys.org
avito009 said:
I thought moment of inertia depends on mass of the object and also its shape. But prof Lewin says it doesn't depend on mass.
No, he does not say that.
 
This doesn't regard the inertial moment much.
 
He says no such thing, You've wasted fifteen minutes of my time. I hope you got your laughs from that.
 
avito009 said:
But prof Lewin says it doesn't depend on mass.
Not quite. He does demonstrate that the acceleration does not depend on the mass.

Not even sure he mentions the term 'moment of inertia' at all in that video.
 
Vanadium 50 said:
He says no such thing, You've wasted fifteen minutes of my time. I hope you got your laughs from that.
This is so funny! On the assumption that every post deserves some sort of response..Dont read this. Sorry.. Too late
But seriously, does your 15 minutes 'wasted' time include the time needed to make your post?
 
No, just watching the 15 minute video.
 
Vanadium 50 said:
He says no such thing, You've wasted fifteen minutes of my time. I hope you got your laughs from that.

You should have told him that the answer to his question is somewhere in the folloing lecture:

 
I don't think this thread serves any purpose any more. It should probably be closed or moved out of view.
 

Similar threads

Undergrad Resolve moment of inertia at an angle
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Moment of Inertia about an axis and Torque about a point
  • · Replies 5 ·
Replies
5
Views
3K
Undergrad Explanation of parallel axis theorem
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Moment of inertia of human body with limbs at an angle
  • · Replies 12 ·
Replies
12
Views
2K
Why Do Different Objects Share Similar Moments of Inertia?
  • · Replies 1 ·
Replies
1
Views
2K
How can I calculate the moment of inertia of any object?
  • · Replies 10 ·
Replies
10
Views
2K
Moment of inertia where mass and torque are at a different positions
  • · Replies 69 ·
3
Replies
69
Views
6K
Undergrad Is it possible to create linear acceleration using nothing but different moments of inertia beteen a wheel and axle?
  • · Replies 5 ·
Replies
5
Views
2K
High School Why does torque increase with increasing moment of inertia?
  • · Replies 13 ·
Replies
13
Views
2K
Torque and Moment of Inertia of a Lever Arm
  • · Replies 2 ·
Replies
2
Views
3K