Elastic and inelastic collisions

  • #1
MBBphys
Gold Member
55
0

Homework Statement


In a closed system, in an inelastic collision, momentum and total energy is conserved, but total kinetic energy is not.
But how is this possible? If we have a change in total kinetic energy, we have a change in velocity, and so we must have a change in momentum as:
momentum=mass*velocity
So I am really confused!
Thanks :)

Homework Equations


n/a

The Attempt at a Solution


n/a
 

Answers and Replies

  • #2
TSny
Homework Helper
Gold Member
12,955
3,309
Keep in mind that kinetic energy is a scalar quantity and momentum is a vector quantity.

Think about the example of two equal masses moving toward each other with equal speeds and the two masses stick together and come to rest after they collide.
 

Related Threads on Elastic and inelastic collisions

Replies
5
Views
4K
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
16
Views
2K
  • Last Post
Replies
4
Views
2K
  • Last Post
Replies
1
Views
18K
  • Last Post
Replies
1
Views
3K
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
4
Views
3K
Replies
1
Views
13K
Replies
1
Views
2K
Top