On 4/27/2023 2:29 PM,
mitchr...@gmail.com wrote:
On Wednesday, April 26, 2023 at 12:46:11 PM UTC-7, Jim Pennino wrote:
mitchr...@gmail.com <mitchr...@gmail.com> wrote:
throw a frame upward and it slow down
in space instead. Acceleration and
deceleration are both like gravity.
Meaningless, idiotic, gibberish.
Gravity is deceleration.
That's right, Roy. It's negative upward acceleration. It's a great use
for negative numbers!
It manifests in two ways.
Drop something vs throwing
it upward..
When you drop something it initially has zero velocity. But the negative acceleration of gravity gives it a negative velocity and it falls.
When you throw something upward it has positive (upward) velocity. But
the negative acceleration of gravity slows it, finally it stops and then
moves downward, as the velocity decreases, until it reaches zero and
continues to decrease and becomes more and more negative.
Thanks for showing us how negative numbers are useful, Roy!
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