Answer to Question #110668 in Mechanics | Relativity for Zina Gawanson

Question

Hello!
I wonder what kind of vehicle (small or big) would be best in a head-on car crash with another car. I also wonder where the safest seat is in a head-on car crash, like where could I sit to get as least/lightly damage as I can. I am trying to understand this but I have trouble finding the connections to this with kinetic energy, impulse, momentum, power, and acceleration. I would apprentice if you could help.

Thanks in advance.
Best regards
Zina Gawanson

Answer 1

$K.E. =\frac12mv^2$

$p=mv$

multiplying 2m on both sides

$K.E\times m\times2=\frac12mv^2\times m\times2$

$2mK.E.=m^2v^2$

substituting the value of p in the above equation we get

$p^2=2mK.E.\\p=\sqrt{2mK.E.}$