@Iosis
50 Km/h u gradu zvuči OK?
Baci pogled ovde
Imagine you are driving at 50 kmh, and without wearing your belt. Through circumstances for which you have not accounted for, or for some other uncontrollable factor, you have a crash into another car or a solid object. In this moment your body will experience the force of several tenths of g-force. Suppose there is force of only 10 g, and that's mean that your body now weights 10 times more. For the unbelted driver the seat adjustment locking pins holding the seat in position sheer off and your seat now runs forward on its runners just like a train on rails. Do you go through the windscreen? Unlikely, as what happens in the real world is that your seat accelerates forward with the speed of about 45 kmh and your knees go into and under the dashboard. This exerts force downward through your lower-legs towards the floor of the car and to your feet. As your feet are on the floor, and remember that the floor may be buckling upward at this point too, that force has to be dissipated somewhere, and to do that is to shatter your legs between knee and ankle - most likely, to shatter your ankles as well. Remember also the seat at this point is still trying to go forward, as more force has yet to be dissipated.
Most will be aware that your upper leg is located and jointed to your pelvis by a ball of bone at the top of the limb, which locates into a socket within the pelvis itself. Now, probably those have gone too, as well as the pelvic bone. If you think this is bad then consider this. By the time the vehicle has come to rest you are probably well and truly trapped, and even if you are still alive at this point, and you are lucky, someone will call for the emergency services. How long does that take for them to get there, and when they do, what happens then? Firstly, you need to be removed from the car, and with two shattered shins, ankles, hips and possibly a broken pelvis, how do you think it is going to feel when a bunch of Fire and Rescue people start pulling and pushing at you in order to achieve this? You will be screaming your lungs out, that is unless you have had your chest caved in by the steering wheel resulting in those being punctured as well!
Ukratko:
What happens to an unbelted passenger while hitting a wall at 50 km/h?
There will be a total of 3 collisions. The first when you vehicle hits the wall and stops. Second when your body hits the steering wheel and stops and third when your internal organs hit the inside of your body. As the third collision happens your organs will be torn loose, your heart will be torn away from your aorta and you will bleed to death. As far as the person in the back seat they will suffer the same fate. The whole mess is not very pleasant to think about.
Cela gornja priča je vezana za udarac u
stacionarni objekat. Sa osnovnim znanjem fizike možeš da pretpostaviš šta se dešava u sudaru sa
pokrenim objektom koji se kreće u suprotnom smeru. Tada i brzine manje od 50 km/h mogu biti jako opasne, čak smrtonosne.
P.s. Onaj deo "stalno ulaziš - izlaziš" realno i nije nikakav argument osim ako ne radiš za neku dostavnu / poštarsku službu, pa i tada od lokacije do lokacije često imaš po više kilometara gde samo tako uspeš da dođeš i do brzina većih od 50-60 km/h.