Re: pinhole Falling off the earth

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From: Paul Doherty (pauld@exploratorium.edu)
Date: Tue Feb 25 2003 - 15:09:39 PST 

Message-Id: <l0311071dba81a794b13c@[192.168.111.161]>
Date: Tue, 25 Feb 2003 15:09:39 -0800
From: Paul Doherty <pauld@exploratorium.edu>
Subject: Re: pinhole Falling off the earth

Hi Jhumki

You can measure this force although it is too small to feel

It is directed out away from the rotation axis of the earth and at the
equator it redices your weight measured by a scale by 1/300 or for me about
1/2 pound compared to the reading at the poles.

The solar acceleration is much smaller, a = v^2/r where r the orbital
radius of earth is over a hundred million kilometers. Even though v is
large.

Paul D

>I think it's correct to say that the earth is an accelerating reference
>frame, which, because of rotation and revolution, causes me to move in (two)
>circles, one around the axis of the earth, the other, to a close enough
>approximation, around the sun
>
>So why, as a result of either or both of these circular accelerations, do I
>not feel as if I am falling off the earth, as a result of my own inertia?
>(This is how I feel when I am in a turning car or on a merry-go-round.)
>
>Thanks!
>Jhumki Basu
>
>
>
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