What should be the spring constant of a spring designed to bring a 1300 car to rest from a speed of 95 so that the occupants undergo a maximum acceleration of 6.0 ?

Answer 1

Vf^2=Vi+2ax

but a=F/m

0=Vi^2+2ax where a=-6*9.8m/s^2

solve for x.

then, k=f/x= ma/x