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Re: A Parent's day Gem

Date: Thu, 30 Oct 1997 10:51:03 -0800
From: Leigh Palmer <palmer@sfu.ca>
Subject: Re: Re[2]: A Parents' Day gem

...... I thought John Mallinckrodt's observation about a retarding force
having a greater than first power velocity dependence providing effective
lift to be a revelation here. I'd never heard of such a thing, but it is
obviously true - and significant. .....

Yes, indeed. The amazing thing is that even a spherical projectile, without
any rotation, will experience a lift. ....
Ludwik Kowalski
Let me add a question.

John, did you try to invent a retarding force formula (nonlinear in any way
you wish) which would produce a lift equal to the weight? That would be
even more amazing (even if only one value of v satisfied --> Lift=m*g).

The opposing force does not have to be dissipative. The spherical magnet of
Gilbert can be visualized traveling in a vacuum along the axis of a horizontal
solenoid and charging a capacitor. Or some other convertor of kinetic energy.
All value of v (up to c) can be explored without rasing the temperature.