Answer:
Those kind of question have the force and the acceleration as a questions
[tex]a=111.11m/s^2[/tex]
[tex]F=200kN[/tex]
Explanation:
Calculate the force exerted on the car by the barrier and the acceleration of the motion.
[tex]v=56 \frac{km}{h}*\frac{1000m}{1km}*\frac{1h}{3600s}=15.56m/s[/tex]
[tex]F=m*a[/tex]
Acceleration is the derive of the velocity so:
[tex]a=\frac{dx}{dt}=\frac{15.56m/s}{0.14s}=111.11m/s^2[/tex]
Now replacing to find force
[tex]F=1800kg*111.11m/s^2[/tex]
[tex]F=200kN[/tex]
