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Re: Name that force



On Tuesday, Oct 28, 2003, at 06:37 US/Pacific, Chuck Britton wrote:

The force is the impact of each raindrop that hits the BACK wall of
the car or the FRONT of the FRONT wall of the car.

Relative velocity of the drops is slanted backwards, from the car's
point of view.

That is an important observation. The situation
can be further idealized. A cloud producing rain
is replaced be a shower-head staying above the
car. In that way the BACK wall and the FRONT
wall are dry. Will the car still be slowing down at
a rate proportional to the rate at which the mass
is increasing? I do not think so.
Ludwik Kowalski