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

  • Thread starter Thread starter something_about
  • Start date Start date
  • Tags Tags
    Mass Speed
Click For Summary
SUMMARY

The discussion centers on the concept of the center of mass (COM) and its velocity, defined by the formula V(C) = (m1*v1 + m2*v2...)/(m1 + m2...). The velocity of the center of mass is heavily influenced by the mass of individual objects within a system, particularly when one object is significantly more massive than others. In scenarios where a very large mass (M1) is present, the velocity of the center of mass (V(C)) approaches the velocity of that large mass (V1), even if V1 is much smaller than the velocities of lighter objects (V2, V3). This highlights the dominance of mass in determining the COM's behavior.

PREREQUISITES
  • Understanding of basic physics concepts such as mass and velocity
  • Familiarity with the formula for center of mass velocity
  • Knowledge of how mass distribution affects motion
  • Basic algebra skills for manipulating equations
NEXT STEPS
  • Study the implications of mass distribution on the motion of systems in "Classical Mechanics"
  • Explore examples of center of mass calculations in "Physics textbooks"
  • Learn about the effects of mass on gravitational interactions in "Astrophysics"
  • Investigate the concept of limit cases in physics, particularly in "Calculus-based physics courses"
USEFUL FOR

Students of physics, educators teaching mechanics, and anyone interested in understanding the dynamics of mass and motion in physical systems.

something_about
Messages
27
Reaction score
0
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
 
Last edited:
Physics news on Phys.org
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?
 

Similar threads

  • · Replies 2 ·
Replies
2
Views
1K
  • · Replies 10 ·
Replies
10
Views
4K
  • · Replies 4 ·
Replies
4
Views
4K
Replies
1
Views
2K
  • · Replies 12 ·
Replies
12
Views
3K
  • · Replies 20 ·
Replies
20
Views
3K
Replies
17
Views
2K
  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 20 ·
Replies
20
Views
3K