A 1200 kg test car is traveling at 25 m/s when it crashes head on into a wall and comes to a stop. if the time of impact is 0.04 s, what is the force acting on the car?

Given:

m (mass of the car) = 1200 Kg

u (initial velocity) = 25m/s

Time of impact=0.04s

v (final velocity) = 0.

Now we know that

v=u + at

Where v is the final velocity

u is the initial velocity

a is the acceleration

t is the time of impact

Substituting these values we get

0=25+ax0.04

-0.04 a = 25

a=-625 m/s^2

Now we also know that

F=mxa

Where F is the force

m is the mass of the car

a is the acceleration of the car

F=1200 x 625

F=750000N