• #### Trajectory Question: Newton's Cannon ?

From Jamie Kahn Genet@21:1/5 to Jolly Roger on Wed Apr 27 19:47:55 2016
Jolly Roger <jollyroger@pobox.com> wrote:

On 2016-04-15, Bob <rgsros@notme.invalid> wrote:
Hello,

Re Newton's famous Cannon experiment:

With a moderate muzzle velocity, the ball falls to earth.
I am fairly sure that the path it takes is parabolic.
True ?

With the correct additional velocity, the ball has enough velocity
to be able to circle the earth and return.
Assuming it just "kisses" the surface, I believe it (then) follows a circular orbit as it goes around and around.
True ?

But again, the initial trajectory would still be parabolic, wouldn't it ? True ?

At what point does it change, therefore, from a parabolic to the
circular orbit ?

This is rec.media.players.portable.ipod.

Confused people... :-D
--
If you're not part of the solution, you're part of the precipitate.

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• From Jolly Roger@21:1/5 to Bob on Fri Apr 15 22:26:49 2016
On 2016-04-15, Bob <rgsros@notme.invalid> wrote:
Hello,

Re Newton's famous Cannon experiment:

With a moderate muzzle velocity, the ball falls to earth.
I am fairly sure that the path it takes is parabolic.
True ?

With the correct additional velocity, the ball has enough velocity
to be able to circle the earth and return.
Assuming it just "kisses" the surface, I believe it (then) follows a
circular orbit as it goes around and around.
True ?

But again, the initial trajectory would still be parabolic, wouldn't it ? True ?

At what point does it change, therefore, from a parabolic to the
circular orbit ?

This is rec.media.players.portable.ipod.

...

--
E-mail sent to this address may be devoured by my ravenous SPAM filter.
I often ignore posts from Google. Use a real news client instead.

JR

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• From Bob@21:1/5 to All on Fri Apr 15 18:11:17 2016
Hello,

Re Newton's famous Cannon experiment:

With a moderate muzzle velocity, the ball falls to earth.
I am fairly sure that the path it takes is parabolic.
True ?

With the correct additional velocity, the ball has enough velocity
to be able to circle the earth and return.
Assuming it just "kisses" the surface, I believe it (then) follows a
circular orbit as it goes around and around.
True ?

But again, the initial trajectory would still be parabolic, wouldn't it ?
True ?

At what point does it change, therefore, from a parabolic to the
circular orbit ?

Bob

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