bromsar kontra motor effekt

hittade en liten text kanske inte helt matematiskt riktigt men får en att tänka på vilka påfrestningar en bil utsätts för ....ex uni ball's storlek m,m

" I rember an old high scool science lesson that make this point clearly.
Consider a 4000 pound car with 250 hp .Such car accelerate from 0-60 mp/h in 12 sec,yet can stop from 60-0 in 3 sec. Since it can stop three times faster than it accelerate,we can say that the brake system is working at an equivalent rating of 750hp .
Think of that next time you find a a bound up rod end............."