Re: gravity
- From: "Greg Neill" <gneillREM@xxxxxxxxxxxxxx>
- Date: Sat, 24 Mar 2007 11:27:37 -0400
<bob@xxxxxxxxxxxxxx> wrote in message
news:1174749495.052805.89370@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
I'm making a computer program that features a bouncing rectangle,
and I'm trying to add gravity. I was wondering if gravity can ever
generate a torque on the rectangle (which has its mass uniformly
distributed). I don't think it can generate a net torque because
I think the torques on all points will cancel out. Is this correct?
It's true if the gravitational field is of uniform
strength and direction over the entire model. So
a rectangle in a box wherein the field is uniform
will not experience a torque due to gravity, but
a rectangle in orbit about a gravitating body (like
a planet -- a radially symmetric field) would feel
a torque if its long axis were not lined up with
the center of the gravitating mass.
.
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