gravity

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From: Jennie Brotman (jbrotman52@hotmail.com)
Date: Mon Nov 04 2002 - 14:28:33 PST 

From: "Jennie Brotman" <jbrotman52@hotmail.com>
Subject: gravity
Date: Mon, 04 Nov 2002 14:28:33 -0800
Message-ID: <F39JJSgdX2Cevsicv7c00008059@hotmail.com>

Hi,

Today i introduced the concept of gravity as a force of attraction between
all objects and the reason why objects fall towards the center of the earth
on our planet. my students were perplexed by the abstract concept that
there is this invisible pulling on things (by the earth/planet) to make them
fall. am i right in saying that we don't REALLY know exactly what gravity
is- what we know is how planets, objects, etc. behave and so have tried to
formulate theories to explain that behavior, one of which is that there is
this force of attraction called gravity attracting things to each other? are
there further theories about where this force comes from or what it is more
precisely? any info on the "why?" i think einstein's ideas about gravity
dont' call it a force at all, but a curvature in space-time(!)- but are
there any explanations for the theory that it is a force? or do most
physicist believe einstein's theory and don't believe its a force of
attraction at all? any ideas on how to make this very abstract concept more
concrete would be very helpful!

thanks for you help,
jennie

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