tu plang
knob
mmm my bad, i think my two posts basically took contradictive view points. i was in a world of thermodynamic pain last night, dynamics was last weekNah, he's actually right. If you hit an identical car head on and you're both doing 50km/h, then it will provide exactly the right force and deformation to keep the impact point fixed (as I said before), and you'll effectively be running into a solid wall at 50km/h also. What I said about relative velocity before stands, but it's relative TO THE IMPACT FRONT.
just to vent some anger, they managed to fuck up the numbers on the exam so that our rankine-cycle power station was running at an efficiency of -0.3. i guess you could interpret it as a "trick question" but when you ask the lecturer whats going on and he says "you've done it wrong" in not so many words, you tend to think they really have fucked up. 400 odd people had the same issue.