- #1
James22
- 8
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Homework Statement
I have attached the assignment below. The weight of the car will be 3702lbs
Homework Equations
The Attempt at a Solution
I am not sure if I am on the right track, but so far I have calculated the kinetic energy as;
E=1/2 mv^2
0.5 x (3702/32.2) x 7.33ft/s^2 = 3091.38 ft-lb
I have chosen to use a 6" crumple zone and 4 springs to absorb the impact.
This is where I run into trouble trying to get my head around the concept.
I know for the spring
U=0.5*k*s^2
where;
k = spring co-efficient
s = spring displacement
Since I am trying to stop the car in 6" do I have to treat the kinetic energy as double? Then divide it over the 4 springs that I will be using to stop the car?
Thanks,
Kyle