How Does Mass Influence the Velocity of the Center of Mass?

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In summary, the center of mass is a special point in a body that moves as if the entire mass of the body were concentrated in it. Its velocity is calculated by taking the mass-weighted average of the individual velocities of all the objects in the system. This means that the velocity of the center of mass is most affected by the mass of the individual objects in the system. For example, if there is one very massive object and several smaller ones, the velocity of the center of mass will be closer to the velocity of the massive object. This is because as the mass of the lighter objects approaches zero, the velocity of the center of mass will approach the velocity of the massive object.
  • #1
something_about
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Center of mass and its speed

hi,I'm not shure if this belongs in math section or here

The center of mass is special point in body and is moving as if whole mass was in it.

Velocity of center of mass V(C)= ( m1*v1 + m2*v2... )/(m1 + m2...)

V(c) is in a way an average speed of all the individual speeds bodies in the system have. Value of V(C) depends most on the mass of individual objects in a system. If system contains one very massive body and several others with small mass, then value of V(c) will be very close to the speed of a body with large mass.


It does make some sense,but I'm looking at formula
V(C)= ( m1*v1 + m2*v2... )/(m1 + m2...) and can't figure out how does that work out in this formula. If M1 has very large mass and speed V1 smaller approx. by factor 100 from speeds of other bodies, why would formula for V(C) give result that is closer to V1 than say to V2 and V3 ?

thank you in advance
 
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  • #2
It might help to think about it this way: What happens to the center of mass when the mass of the lighter object goes to zero?
 
  • #3
for your answer

The formula for the velocity of the center of mass takes into account the mass of each object in the system. So, even if M1 has a larger mass than M2 and M3, the fact that M2 and M3 have a higher speed will still contribute to the overall velocity of the center of mass. This is because the formula takes into account the mass of each object and calculates the average speed based on that. Therefore, the result may be closer to V1, but it will still be affected by the speeds of M2 and M3. This is because the center of mass is a point that represents the overall motion of the system, not just one individual object.
 

FAQ: How Does Mass Influence the Velocity of the Center of Mass?

What is the center of mass?

The center of mass is a point in an object or system where the mass is evenly distributed and the object will balance. It can also be referred to as the center of gravity.

How is the center of mass calculated?

The center of mass can be calculated by finding the average position of all the mass in an object or system. This can be done by dividing the total mass by the sum of the individual masses multiplied by their respective distances from a chosen reference point.

What factors affect the center of mass?

The center of mass is affected by the distribution of mass within an object or system. The mass, shape, and density of the object can also impact the center of mass.

What is the relationship between center of mass and stability?

The center of mass is directly related to an object's stability. If the center of mass is low and within the base of support, the object will be more stable. However, if the center of mass is high and outside the base of support, the object will be less stable.

How is the speed of the center of mass related to the motion of an object?

The speed of the center of mass is directly related to the motion of an object. If there is no external force acting on the object, the center of mass will continue to move at a constant speed in a straight line. If there is a net external force, the center of mass will accelerate in the direction of the force.

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