Answer:
The average acceleration of the driver during the collision is [tex]-348.4\frac{m}{s^{2}}[/tex]
Explanation:
Initial speed of car , [tex]u=85\frac{km}{h}=\frac{85\times 5}{18}\frac{m}{s}[/tex]
=>[tex]u=23.61\frac{m}{s}[/tex]
Finally the car comes to rest .
Therefore final speed of the car , [tex]v=0\frac{m}{s}[/tex]
Distance traveled while coming to rest , s = 0.80 m
Using equation of motion
[tex]v^{2}=u^{2}+2as[/tex]
=>[tex]0^{2}=23.61^{2}+2\times 0.80\times a[/tex]
=>[tex]a=-348.4\frac{m}{s^{2}}[/tex]
Thus the average acceleration of the driver during the collision is [tex]-348.4\frac{m}{s^{2}}[/tex]
