(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

I have attached the assignment below. The weight of the car will be 3702lbs

2. Relevant equations

3. 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

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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# Homework Help: Design of an automotive bumper

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