Question about momentum depending if the collision is elastic or not?

  • Thread starter nukeman
  • Start date
  • #1
nukeman
655
0
Question about momentum depending if the collision is elastic or not??

Homework Statement



Im writing up a lab, and there is something I can seem to get. Does the change in momentum depend on whether the collision is elastic or not? I know it does, but HOW?

For example collision of 2 carts, 1) collision with velcro on each cart, 2) attracting magnets on each cart 3) repeling magnets on each cart)

Is it reasonable to take as an approximation that the linear momentum of a system of collising macroscopic objects is conserved???

Thanks for any help!


Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
LawrenceC
1,198
5


When the collision is not an elastic one, there is a coefficient of restitution that comes into consideration. It takes on values between 0 and 1. It is one for an elastic collision. It is 0 for an inelastic collision.

In general:

Vb' - Va' = e * (Va - Vb)

where primes denote relative velocity after impact of two objects. e is the coefficient of restitution.
 
  • #3
Redbelly98
Staff Emeritus
Science Advisor
Homework Helper
Insights Author
12,134
161


Momentum does not change, as long as external forces are not present (or negligible). It does not matter whether the collision is elastic or not.
 

Suggested for: Question about momentum depending if the collision is elastic or not?

Replies
3
Views
1K
  • Last Post
Replies
13
Views
2K
Replies
11
Views
2K
  • Last Post
Replies
4
Views
9K
  • Last Post
Replies
5
Views
11K
  • Last Post
Replies
2
Views
6K
  • Last Post
Replies
3
Views
4K
Replies
6
Views
1K
Replies
3
Views
2K
  • Last Post
Replies
1
Views
672
Top