(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

During a crash test, dummy x12 has a mass of 80 kg and rides in a 1120-kg car. Dummy y17 has a mass of 80 kg and rides in a 7120-kg truck. The vehicles approach each other with velocities of 30 m/s (about 67 miles per hour) in opposite directions (car heading east). The vehicles collide and their bumpers lock together after the collision. The collision takes 0.015 s to complete.

-You should find that while the car and truck undergo equal and opposite changes in momentum and are subject to equal and opposite forces, this is not true for the dummies. Explain why this is so.

2. Relevant equations

[tex]\Delta[/tex]P = Ft

P = mv

3. The attempt at a solution

I did out all the momentum and force work for the cars, but I'm just not sure conceptually how to explain this. It makes logical sense dealing with inelastic collisions, and we constantly see this happen in real life where a passenger is a car is severely injured when hit by a truck/bus/larger object. Any help? I dont think I should be proving this with math, but even so, I'm not sure how. Any ideas?

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# Homework Help: Just some conceptual stuff about car crashes

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