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  • 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,

    Was wondering about this.

    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,

    Was wondering about this.

    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

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Bob@21:1/5 to All on Fri Apr 15 18:11:17 2016
    Hello,

    Was wondering about this.

    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

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)