Difference between revisions of "Forest UCM Ch3 CoM"

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The Center of mass
 
The Center of mass
  
=Definiiton of the Center of Mass=
+
=Definition of the Center of Mass=
  
 
The position <math>\vec R</math> of the center of mass is given by
 
The position <math>\vec R</math> of the center of mass is given by
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:<math>\vec{R} = \frac{1}{M} \int \vec{r} dm</math>
 
:<math>\vec{R} = \frac{1}{M} \int \vec{r} dm</math>
 +
 +
=Example 1: CM of a flat disk=
 +
 +
=Example 2: CM of a semicircle=
  
  
 
[[Forest_UCM_MnAM#Center_of_Mass]]
 
[[Forest_UCM_MnAM#Center_of_Mass]]

Revision as of 14:10, 13 September 2014

The Center of mass

Definition of the Center of Mass

The position [math]\vec R[/math] of the center of mass is given by

[math]\vec{R} = \frac{\sum_i^N m_i \vec{r}_i}{\sum_i^N m_i}[/math]


The center of mass is given as the sum of the position of each object in the system weighted by the objects mass.


For a rigid object the location of the center of mass is given by


[math]\vec{R} = \frac{1}{M} \int \vec{r} dm[/math]

Example 1: CM of a flat disk

Example 2: CM of a semicircle

Forest_UCM_MnAM#Center_of_Mass