The Traffic Accident Reconstruction Origin -ARnews-

Re: Chain reaction accident

Bruno Schmidt ([email protected])
Fri, 18 Dec 1998 22:48:03 -0500 (EST)

Paul,

If you say that there was no braking by any of the involved vehicles, how did you determine any of the post-impact speeds?

How did you determine the ke that you multiplied by 64.4 and square-rooted? Typically, post-impact speeds are determined by skid to stop, then momentum conservation is applied to the collision to determine pre-impact speed, and ke is not a player.

If you do use a kinetic energy approach, you need to include the amount of energy lost to crush to include in the original kinetic energy.

Bruno Schmidt
[email protected]

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