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• To: <seaint(--nospam--at)seaint.org>
• Subject: Re: Car Crash Loads
• From: "Greg Smith" <strusup(--nospam--at)gte.net>
• Date: Thu, 25 Feb 1999 08:56:44 -0600

```1/2M*V^2 gives to total energy of the collision.  To get the force you
divide by the length of deformation (apx. 4 ft.).  I got 3,388,000 slugs.
Two cars head-on would have a combined velocity of 120 mph (same as one car
hitting wall at that speed).
Greg
-----Original Message-----
From: Parkerres(--nospam--at)aol.com <Parkerres(--nospam--at)aol.com>
To: seaint(--nospam--at)seaint.org <seaint(--nospam--at)seaint.org>
Date: Thursday, February 25, 1999 2:35 AM

>To all:
>
>A client asked me today to give him a "simple" formula to translate a
speeding
>car into an impact load.  For example, if a 3500 pound car is traveling at
60
>mph and hits a wall, what is the impact force?  Of course, my brain is so
>clogged with Code regulations, I only have vague recolations of the physics
>involved with solving this problem.
>
>Any input would be appreciated.
>
>Thanks,
>
>Bruce Resnick, SE
>Parker Resnick Str. Eng.
>
>

```