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 It is a riddle (Posted on 2005-04-13)
It is a riddle.
It is the strongest force,
and yet it is not a force.
It never accelerates,
but it is always moving.
It never rests, and
it never gets tired.
It has been defined many ways,
but no one can quite capture it.
What is it?

 See The Solution Submitted by Michael Cottle Rating: 3.7143 (14 votes)

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 Reply to C | Comment 36 of 90 |

You are right at one point but not the entire point.

When you place an object on the table and ties a string with another object to be hanged freely down with another object, the object would fall due to the gravity and it is being computed as part of the acceleration of speed.

However, when you stand still on the ground, you are influenced by gravity since it causes you to stand still on the earth.  We do not use any gravity to compute as part of the acceleration when we stand on the ground.  Don't tell me a person would be accelerated when he stands still on the ground.  Thus, gravity might not necessarily lead to acceleration.

The same of the gravity in the universe.  All the planets are constantly moving around their tracks due to the influence of gravity.  Not all of them accelerate, but only some.

You put a cup on the table.  The cup stands still on the table due to the work of gravity.  Without the gravity, it would not stand still but float around.

Thus, gravity might not necessarily be computed as part of acceleration.

Thanks

Edited on April 28, 2005, 9:44 am

Edited on April 28, 2005, 9:45 am
 Posted by Jonathan Chang on 2005-04-28 09:35:16

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