Answer:
.12 m or 12 cm.
Explanation:
Interesting question.
The car weights 12000 Newtons.
The spring constant = 25000 n/m
Each spring will support (this isn't true, but it is all you have) 1/4 of the weight of the car.
1/4 * 12000 = 3000 N
Now look at the formula
F = k*x
You know F and you know k.
All you need to do is solve for x.
3000N = 25000 N/m * x Divide by 25000
3000 N / 25000 N/m = x
3/25 of a meter = x
x = 12 cm.
Each spring should compress 12 cm.
What makes this question really interesting is what happens when the car hits a bump?