How to dissolve this physic problem?

Question

Cars used to be built as rigid as possible to withstand collisions. Today, though, cars are designed to have "crumple zones" that collapse upon impact. What is the advantage of this new design?

Answer 1

dissolve!! perhaps needs melting!

see i can try it>

look at the action-reaction (A-R) pairs that generate owing to Newtons's 3rd law.

> all forces appear and disappear from our worldly or heavenly affairs in PAIRS

> lets see what a teeny (8th standard) student will tell his/her friend when he slipped while getting up from ground.

teeny> oh i did the action nedded, but the reaction failed to arrive at the right time.

> friend> oh yaa, exactly! i also had been in such situations.

--------------------------------------...

spirit of the story, by the said law, IFFFFF action takes place, at all, REACTION WILL arrive at you.

> if something goes wrong, blame it on RIO > the action, which could not take place as desired.

============================

to your question>

for a given event, say inevitable collision, a rigid body will dutifully conduct "action" and "reaction" pairs, and resulting force generated by such a pair will devastate the smaller masses (persons) more than our enclosure.  

If enclosure is fragile (collapsible), action will partially fail to get conducted, so lesser reaction will be expected, a smaller force will ooze out, and crubling will sustain the work done by force in dismentling itself.

you may cull out what you deem fit.

hope it helps, cry if it does!!!