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dineshjegdeesh
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Fixed Center of Gravity for an Object Which Changes its Weight

09/28/2013 7:12 AM

lets say a body of mass M and it has center of gravity at point C

Now when i change its mass to M2, the center of gravity changes to C2

the question is, to maintain the center of gravity for change in mass, what kind of steps can be done?

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JohnDG
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#1

Re: fixed center of gravity for an object which changes its weight

09/28/2013 7:49 AM

Are you being serious?

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dineshjegdeesh
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#2
In reply to #1

Re: fixed center of gravity for an object which changes its weight

09/28/2013 7:54 AM

why?

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JohnDG
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#6
In reply to #2

Re: fixed center of gravity for an object which changes its weight

09/28/2013 8:36 AM

Surely it's obvious from the definition of the centre of gravity, if not intuitively?

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redfred
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#3

Re: fixed center of gravity for an object which changes its weight

09/28/2013 8:01 AM

How does one violate the Conservation of Mass?

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Anonymous Hero
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#4

Re: fixed center of gravity for an object which changes its weight

09/28/2013 8:16 AM

Let's pretend you have a fish tank that has no appreciable mass. You fill the tank with water and note the system mass and CoG.

Now, you fill the tank with lead (take out the water, first). CoG is the same, but the mass is different.

All you need to do is distribute the new mass exactly as the old mass was distributed.

Was that too hard?
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kramarat
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#5
In reply to #4

Re: fixed center of gravity for an object which changes its weight

09/28/2013 8:33 AM

He's going to find himself falling over if he doesn't do his own homework.

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Fredski
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#8
In reply to #4

Re: fixed center of gravity for an object which changes its weight

09/28/2013 10:20 AM

liquid lead or lead bars??
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lyn
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#7

Re: fixed center of gravity for an object which changes its weight

09/28/2013 10:14 AM

Tips for Posting on CR4:

  • Look for answers before you post. Search CR4 or use a search engine to see if you can find the answer to your question.
  • Do your own homework. CR4 is not a homework cheat site; however, if you have questions about understanding concepts or how a portion of a problem is derived, these types of questions will be accepted.

Is this object L shaped? Isn't the homework overdue by now????
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SolarEagle
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#9

Re: fixed center of gravity for an object which changes its weight

09/28/2013 11:01 AM

Here's a good resource to grasp this concept....

http://www.peepandthebigwideworld.com/games/bunnybalance.html

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redfred
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#10

Re: fixed center of gravity for an object which changes its weight

09/28/2013 11:35 AM

But what if part of the mass is relativistic....

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#11

Re: fixed center of gravity for an object which changes its weight

09/28/2013 3:00 PM

How does it change its weight?

If by increasing its density, but keeping the same size and shape, no change in CG.

If by adding other weight(s), it depends on their location w.r.t. the original body. In that case, recalculate using normal CG formula.

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Economist
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#12

Re: fixed center of gravity for an object which changes its weight

09/29/2013 12:46 AM

Alas, I feel this forum is deteriorating with each passing year!

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Users who posted comments:

Anonymous Hero (1); dineshjegdeesh (1); Economist (1); Fredski (1); JohnDG (2); kramarat (1); lyn (1); redfred (2); SolarEagle (1); Tornado (1)

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