Question about centre of mass and load centre of gravity

In summary, the centre of mass and load centre of gravity of a heavy vehicle are usually the same, but may differ in situations where gravity changes significantly. The centre of gravity is the 3D balance point of the vehicle and determines the distribution of mass in the vertical plane. The roll center of the suspension is the point where the vehicle will roll under centrifugal force, and is determined by the suspension arm linkage angles. The centre of gravity and roll center are usually located at different points and can be changed by modifying the weight distribution and suspension arm placement respectively. These factors can affect traction and control during rapid changes in direction.
  • #1
aabgenay
1
0
Can anyone tell me that if centre of mass and load centre of gravity of a heavy vehicle doesn't concide,what vl be its effect on vehicles acceleration?
 
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  • #2
generally the center of gravity and the center of mass is the same. However, if you are in a field where gravity changes significantly from 1 point to another, then it would be 2 different values.
 
  • #3
Center of Gravity (CG) is defined as that point about which, if the body were suspended from it, all parts of the body would have equilibrium ..i.e.. without tendency to rotate. it is the 3D balance point of the race car. all acceleration forces acting on a body can be considered to act through the CG of that body..we have the cg to be as low as we can get it.

Mass Centroid- is related to Cg ..sort of...ifin we slice the car into a series of sections, like a loaf of bread, each slice would have its own CG...if, in a side view, we draw a line connecting each sliced CG..we have the Mass Centroid Axis..not really a straight line but close to it.
it gives an indication of the distribution of the vehicles mass in the vertical plane.

Roll Center of the suspension is that point , in the traverse plane of the axles, about which sprung mass of that tend of the vehicle will roll under influence of centrifugal force. It is determined by drawing a line from the tire contact patch to a point in space that is the intersection of the upper and lower suspension arm linkage angles.

The CG and RC are located at different points. Usully the CG is many inches above the RC. CG can be change by moving " weight " around on the chassis.. The RC is changed by modifying how the upper and lower control arms mount to the chassis. Correct changes will improve the weight transfer to the rear tires thus improving traction.
lot of other stuff goin on here.. race car math of some is on my post in General Physics post " Race Car Physics" 31 Dec 2008
 
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  • #4
aabgenay said:
Can anyone tell me that if centre of mass and load centre of gravity of a heavy vehicle doesn't concide,what vl be its effect on vehicles acceleration?

Ask a truck driver. It won't have much effect on acceleration. But control during rapid changes in direction can get a little unpredictable.
 

What is centre of mass?

The centre of mass is the point at which the entire mass of an object is considered to be concentrated. It is the point where the object can be balanced and is affected by external forces.

How is centre of mass determined?

The centre of mass is determined by taking into account the distribution of mass within an object. For symmetrical objects with uniform density, the centre of mass will be located at the geometric centre. For irregularly shaped objects, mathematical calculations or experiments can be used to determine the centre of mass.

What is the difference between centre of mass and centre of gravity?

The centre of mass and centre of gravity are often used interchangeably, but they are not the same. The centre of mass is a point at which the entire mass of an object is concentrated, while the centre of gravity is the point at which the force of gravity acts on an object. The centre of gravity can change depending on the object's orientation, while the centre of mass remains constant.

Why is it important to know the centre of mass?

Knowing the centre of mass is important in understanding how objects will behave when subjected to external forces. It helps with balancing objects, predicting their motion, and designing stable structures.

How does the centre of mass affect balance?

The centre of mass is directly related to an object's balance. If the centre of mass is located within the base of support, the object will be stable and balanced. If the centre of mass is outside of the base of support, the object will be unbalanced and may topple over.

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