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On Tue, 24 Oct 1995, Mike Zimmerman wrote: > > 1a)You are neutrally bouyant at X fsw. You instantaneously (I'm > guessing this assumption helps out the mathematics, ignore > it if it doesn't) inflate your BC such that you are Y lbs > bouyant at that instant**. Now assuming a BC with infinite volume > > Jack and Jill level (or slightly better) explanations welcomed, > or even better a pointer to a decent reference. > > Thanks, > Mike > -- seriously, the mathematics for a complex body moving in a viscous medium is the kind of problem rocket scientists are paid to do. because i'm not a rocket scientist, i can only give *jack-n-jill* answers. this is an upside down *terminal!* velocity problem. instead of a *free-fall* you have a *free-rise.* the standard result for simple assumptions on the physical model is that the terminal velocity is independant of mass and starting velocity. surface area and shape are important though. i wouldn't try to complicate the model anymore (unless you'd like to pay me!) the easiest way to verify the result would be to time a bunch of out-of-control free-ascents. maybe you have an instructor friend that will let you help with a class--you'll get lots of data then. regards, em _____________________________________________________________.sig Eric Maiken email: eapg243@ea*.oa*.uc*.ed* Dept. of Physics o: 714 824-6621 U of California fax: 714 824 2175 Irvine, CA 92715-4575
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