Momentum Change

1. The problem statement, all variables and given/known data

A compact car and a large truck collide head on and stick together (perfectly inelastic collison).

Which vehicle experiences the larger momentum change?

Which vehicle experiences the larger acceleration during the collision?

Explain your answers.

2. Relevant equations

p=mv
I=Ft

3. The attempt at a solution

I think that the truck has a larger momentum change because, first of all, it is conserved, so p=pfinal-initial

Assuming the velocities are the same, only the mass should affect the momentum. So thats why I thought the truck has a larger momentum change.

But I'm not sure..I look at I=Ft and the forces are equal, and so is the time..So would they have equal change in momentum?

HELP! thanks!
 
277
1
The truck will carry on in the same direction with modified velocty, whereas the unfortunate car will find itself going backwards. Now which one has suffered the largest change in momentum? acceleration?
 

The Physics Forums Way

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving
Top