Understanding the Center of Gravity: Effects of Mass, Size, Weight, and Density

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SUMMARY

The discussion focuses on the relationship between the center of gravity (CG) and factors such as mass, size, weight, and density. It is established that the center of mass (COM) scales with the dimensions of the object, and the application of external weights, such as 50 Newtons on a bus, influences the CG during dynamic conditions like turning. A reference to the Wikipedia article on center of mass provides foundational knowledge for calculating CG. The choice of the coordinate system's origin is also emphasized as a critical factor in analyzing CG effectively.

PREREQUISITES
  • Understanding of center of mass (COM) and center of gravity (CG) concepts
  • Basic knowledge of geometry and physics principles
  • Familiarity with density and its implications in physical objects
  • Ability to apply Newton's laws of motion in practical scenarios
NEXT STEPS
  • Research the mathematical formulas for calculating center of mass in various shapes
  • Explore the effects of density gradients on the stability of objects
  • Learn about the principles of rotational dynamics and tipping points
  • Investigate real-world applications of center of gravity in vehicle design and safety
USEFUL FOR

Students of physics, engineers in vehicle design, and anyone interested in the principles of stability and dynamics in physical systems.

Physics Nic
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Hello everybody I am new here and I would like to ask a simple question about the centre of gravity and how it changes with mass, size , weight , density. etc.etc I would like to understand how this phenomenon happens and I have tried searching online to no avail so please help me understand how centre of gravity can change with the above
 
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Physics Nic said:
how it changes with mass, size , weight , density.
These are easy, COM scales with the dimensions of the object.
"etc., etc.?" Those get a little tougher. Anything in particular? Geometry? Density gradient?
 
Example, how does the center of mass change when weights of say 50 Newtons are applied to the undersides of a bus , I understand that the mass will affect (how easy it tips) during a turn but how does this come into play when calculating center of mass or center of Gravity whichever is easier ?
 

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