Which vehicle experiences the greater momentum change in a head-on collision?

  • Thread starter Thread starter Xamfy19
  • Start date Start date
  • Tags Tags
    Change Momentum
Click For Summary

Homework Help Overview

The discussion revolves around a head-on collision between a compact car and a large truck, specifically focusing on the changes in momentum experienced by each vehicle. Participants are exploring the principles of momentum conservation in the context of this collision.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • The original poster questions whether the final velocity of the combined masses is necessary to determine the momentum change. Other participants clarify that total momentum is conserved during the collision, leading to further exploration of what that implies for the momentum changes of each vehicle.

Discussion Status

Participants are actively engaging with the concepts of momentum change and conservation. There is a recognition that both vehicles undergo the same magnitude of momentum change, with some participants affirming this understanding while others seek confirmation of their reasoning.

Contextual Notes

There is an underlying assumption that the collision is perfectly inelastic, as the vehicles stick together post-collision. The discussion does not provide specific numerical values or final velocities, which may limit the analysis.

Xamfy19
Messages
60
Reaction score
0
i need help for this question. i don't know if i got it right or wrong:

a compact car and a large truck collide head on and stick together. which undergoes the larger momentum change?

i thought the answer is "can't tell without knowing the final velocity of the combined masses." Am i correct?
 
Physics news on Phys.org
Originally posted by Xamfy19
i thought the answer is "can't tell without knowing the final velocity of the combined masses." Am i correct?
No. Total momentum is conserved during the collision. Think about what that means.
 
thanks Doc

That means both of them undergone same momentum change. If I am wrong, please let me know. Thanks again, Doc
 


Originally posted by Xamfy19
That means both of them undergone same momentum change. If I am wrong, please let me know.
Each undergoes the same magnitude of momentum change. (The changes are equal and opposite, of course.)
 

Similar threads

  • · Replies 13 ·
Replies
13
Views
2K
  • · Replies 7 ·
Replies
7
Views
3K
Replies
10
Views
3K
Replies
1
Views
3K
  • · Replies 32 ·
2
Replies
32
Views
2K
  • · Replies 5 ·
Replies
5
Views
4K
  • · Replies 10 ·
Replies
10
Views
2K
Replies
9
Views
3K
  • · Replies 6 ·
Replies
6
Views
3K
  • · Replies 30 ·
2
Replies
30
Views
4K