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- Path: sparky!uunet!stanford.edu!morrow.stanford.edu!ssrl01.slac.stanford.edu!tcox
- From: tcox@ssrl01.slac.stanford.edu (Tony Cox - (415)926-3105)
- Newsgroups: alt.individualism
- Subject: Re: Freedom, Social Responsibility, etc. etc.
- Date: 28 Dec 92 12:10:17 -0800
- Organization: SSRL, Stanford Synchrotron Radiation Lab
- Lines: 46
- Message-ID: <1992Dec28.121017.1@ssrl01.slac.stanford.edu>
- NNTP-Posting-Host: ssrl01.slac.stanford.edu
-
- In article <BzzD1I.2pn@SSD.intel.com>, pandit@ssd.intel.com (Milind Pandit) writes:
- > In article <1992Dec23.153139.1@ssrl01.slac.stanford.edu> tcox@ssrl01.slac.stanford.edu (Tony Cox - (415)926-3105) writes:
- >> Firstly, wearing a skid-lid may reduce your chance of being killed
- >> when you fall on your head, but it also _increases_ the chances of
- >> neck injury. You aren't violating the law of energy conservation by
- >> wearing your crashhat - the energy which would have gone into
- >> cracking your skull now goes into compressing your spinal column.
- >
- > Not entirely true. The energy which would have gone into cracking
- > your skull now goes into cracking the helmet. You're not supposed to
- > wear a helmet that has sustained an impact, because it is DESIGNED to
- > absorb energy and be damaged by an impact.
-
- Ok, Ok, you are right. Momentum is what is actually invariant. In
- terms of energy, you have the additional energy of the speeding
- helmet, less that actually absorbed by the helmet in the crash.
- You did, however, remove my last line from the section. Does anyone
- know of any figures which point to different types of injuries when
- and whennot enhatted? The CA bikers assert that wearing helmets
- increases the chances of spinal damage, but I am unaware of any
- scientific analysis of this claim. To me, it seems quite probable.
-
- >
- >> Secondly, anyone who has ever ridden a motor cycle will tell you
- >> that a helmet reduces both your vision and your ability to
- >> determine the source of a noise. Try this simple test. Stand in a
- >> parking lot with your eyes shut and get a friend to toot her horn.
- >> You should be able to point to her car very accurately. Now try it
- >> when wearing a helmet. See?
- >
- > Not true. A well-designed, approved helmet does not obscure your
- > ability to see, unless you can normally see 180 degrees horizontally
- > and vertically without moving your head. I've tried the test you
- > suggest, and am unable to agree with you.
- > --
-
- My helmet is approved, and obscures the hearing just as I have
- indicated. As for vision, one frequently needs to move ones head to
- see what is going on around you. _Much_ more difficult with a hat
- on. Do you ride? I do, and for the most part, I do it with a helmet
- on. But this is my choice, factoring in my riding style and traffic
- density on the routes I travel. Were I to prefer city driving, I would
- think my best interests were served by keeping out of accidents
- altogether - and for that I would prefer to be hatless.
-
- Tony Cox, Stanford, CA
-