Quantcast
  • Register
PhysicsOverflow is a next-generation academic platform for physicists and astronomers, including a community peer review system and a postgraduate-level discussion forum analogous to MathOverflow.

Welcome to PhysicsOverflow! PhysicsOverflow is an open platform for community peer review and graduate-level Physics discussion.

Please help promote PhysicsOverflow ads elsewhere if you like it.

News

PO is now at the Physics Department of Bielefeld University!

New printer friendly PO pages!

Migration to Bielefeld University was successful!

Please vote for this year's PhysicsOverflow ads!

Please do help out in categorising submissions. Submit a paper to PhysicsOverflow!

... see more

Tools for paper authors

Submit paper
Claim Paper Authorship

Tools for SE users

Search User
Reclaim SE Account
Request Account Merger
Nativise imported posts
Claim post (deleted users)
Import SE post

Users whose questions have been imported from Physics Stack Exchange, Theoretical Physics Stack Exchange, or any other Stack Exchange site are kindly requested to reclaim their account and not to register as a new user.

Public \(\beta\) tools

Report a bug with a feature
Request a new functionality
404 page design
Send feedback

Attributions

(propose a free ad)

Site Statistics

205 submissions , 163 unreviewed
5,047 questions , 2,200 unanswered
5,345 answers , 22,709 comments
1,470 users with positive rep
816 active unimported users
More ...

  proof of the property related to center of mass.

+ 0 like - 2 dislike
307 views

Prove the following statement:

"THE SUMMATION OF MASS MOMENTS OF ALL THE COMPONENTS OF SYSTEM ABOUT ITS CENTRE OF MASS IS ALWAYS EQUAL TO ZERO."

Closed as per community consensus as the post is Not graudate-level physics
asked Dec 10, 2014 in Closed Questions by Rohan [ no revision ]
recategorized Dec 10, 2014 by Dilaton

This isn't even true in general, but only holds for systems in rotational equilibrim/when weight is the only force acting.

Anyway, this question is off-topic for PhysicsOverflow as PhysicsOverflow is strictly a graduate-level-only site while this question is high-school or primary-school level.

Voting to close. Users with 500+ reputation may also vote to close by upvoting the close vote.

Isn't it a definition of the center of mass $\mathbf{R}_{\rm{CM}}=\sum_i m_i\mathbf{r}_i/M_{\rm{tot}}$? When $\mathbf{R}_{\rm{CM}}=0$ it means the sum of mass moments is zero.




user contributions licensed under cc by-sa 3.0 with attribution required

Your rights
...