Posted by Geo-TH,In on July 17, 2016 at 12:07:14 from (172.78.30.199):
In Reply to: Re: DOT?? posted by MarkB_MI on July 17, 2016 at 03:26:14:
You're education is a result of Jimmy Carter's voluntary metric conversion act requiring all text books to drop English units and go to MKS. Which later returned to English units.
I'm old school and slugs never got in my way. The slug is the proper English mass unit. Just get your units right in the English system and they will cancel out too. No need to convert to metric.
My point is the same. A 3200# tractor stopping at 1 g takes 3200# of stopping force. Stopping force at .8gs takes 80% the tractor's weight under normal braking.
The real issue what is the stopping force when you're in an accident and will the chains/D rings hole up? I really doubt it. It's not the fall that kills, it's the sudden stop that will. Same applies to a tractor on a trailer. Sudden stops will break DOT required chains and tractor will keep on going.
Below is a link to a Indy driver surviving 214g's. That would have to hurt. Hard to believe the seat belt held up to 214 times driver's weight and driver lived.
Don't think there is a chain strong enough to withstand 100g's
Where did the term slug come from? It was around before Newton laws of motion.
Hint: In was something in England, it's a round object and it weighed 32#. We even call a small lighter round object in the US A SLUG. Enough hints?
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