Re: [ST] for Marc - (energy)

["Masiak, Richard" <Richard_Masiak@xxxxxxxxxxxxxxxx>]

You forgot rotational acceleration.  There is a possibility of having a rotational acceleration too.  I know because I'm pretty sure I had one.  As I was going up & over I death gripped the handle bars (at least until I couldn't hold on any more).  That caused my throttle to close as I went up & over, causing the bike to engine brake, and eventually snap me the rest of the way.  I believe my roataional moment was around the handle bar as the bike went backward and I went forward.

It sounds like you're saying F=ma+(the v of your forward motion)  I'm not quite sure how many different components of "a" there are, but I'm pretty sure I had a rotational acceleration component added in there somewhere.

-----Original Message-----
From: st-bounces@xxxxxxxxxxxxxxxxxxxx
[mailto:st-bounces@xxxxxxxxxxxxxxxxxxxx]On Behalf Of Bruce Parker
Sent: Wednesday, June 07, 2006 10:55 PM
To: Triumph ST List
Subject: Re: [ST] for Marc -


this is true - but it's the kinetic energy you store in the acceleration
phase that you have to dissipate somehow. a simple high side will generate
[your weight times the max height of the center of mass plus the energy of
your forward motion]. that's a lotta foot pounds... and you may not have the
option of doing a Pete Rose landing.

bp

<> It's all about vectors. Ask Dr. Science.
>

I also thought it was pointless to debate the comparative rate of
acceleration towards the ground. That's not what hurts. It's the
deceleration once you hit something that makes you go ?@!#%  and breaks
things.>


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