The effect of gravity on a speeding bullet

Discussion in 'Physics & Math' started by Magical Realist, Jan 31, 2017.

  1. Michael 345 Valued Senior Member

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    Is this your soul posting?
     
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  3. Counter Registered Senior Member

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    It's me (with three souls)

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  5. Q-reeus Valued Senior Member

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    Checked out a few other posts in other threads. Between 'crazy' and 'troll', troll seems more likely imo. Wonder what admin/mods have been thinking all this time?
     
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  7. exchemist Valued Senior Member

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    Yup, another nutcase, I think. I sometimes wonder if these fora are recommended as therapy for such people.
     
  8. origin Trump is the best argument against a democracy. Valued Senior Member

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    Why do you think that? Don't you realize that masses in a gravitational field accelerate? What could possibly prevent the bullet from accelerating towards earth?
     
  9. Q-reeus Valued Senior Member

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    Well it sure aint therapy for those who choose to take the bait! I chose troll over crazy after studying his OP here: http://www.sciforums.com/threads/too-many-chefs.158552/
    Seems too coherent and well versed for a true crazy. But I suppose there are crazies and then again, there are crazies. Still going for troll as best fit though.
     
  10. Michael 345 Valued Senior Member

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    Is that souls with arse in front?
     
  11. origin Trump is the best argument against a democracy. Valued Senior Member

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    9,999
    Reported as off topic trolling.
     
  12. Michael 345 Valued Senior Member

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    Bullet inside gun is
    • traveling at speed of train
    • prevented from falling to Earth by being in the gun
    Bullet fired

    Bullet is now
    • traveling at the speed of the train
    • plus the speed given to it via the exploding propellant (muzzle velocity)
    • and being free of the gun able to fall to Earth (describing a parabolic arc)
    Depending on the height of the gun's attachment to the train (in the region of 2 to 3 metres?) the bullet would indeed begin to accelerate towards Earth under the influence of gravity

    It would also continue its forward momentum from the exploding propellant and most likely hit the ground before all the forward momentum have been expended causing it to form a small furrow

    Here endith my post

    And much of my patience

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  13. Michael 345 Valued Senior Member

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    I sat in on a few psychiatric sessions with patients during training

    Net not around then

    Now I would not recommend these forums for patients therapy

    I might recommend them for student psychiatrists for spot the nut case remote diagnosis

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  14. Counter Registered Senior Member

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    ...as for a bullet leaving a gun...when firing at a moving target you rotate the gun WITH the target. It hit's (providing it is accurate) because the gun is rotating at the same rate (and angle) as the target.

    Other tips on weapons training:

    Fire short controlled bursts with an automatic weapon: if you are on target then you have hit, if not it is a waste of ammunition.

    Count the number of bullets fired and know how many are in a magazine (both you and your target.)
     
  15. origin Trump is the best argument against a democracy. Valued Senior Member

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    9,999
    Jeeze you think your patience is running thin...

    MR's original question (which was quoted in my response) was:

    "Suppose I shot a bullet towards earth from a high flying airplane. Would the bullet:
    A. Keep speeding towards earth at the same speed it left the barrel?
    B. Speed up as it approaches earth?
    C, Slow down as it approaches earth?
    D. Stop suddenly at 10,000 feet?"

    I answered the the bullet would slow down to terminal velocity.

    MR then asked (which was quoted in my response):

    "How about if it was in a vacuum?"

    I answered that the bullet would speed up.

    I do not know why you are talking about trains and stuff but that has nothing to do with the original question.

    When I was in the Navy if we misread a question on a test the grader would write RTFQ. So I say to you RTFQ.
     
  16. exchemist Valued Senior Member

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    Ha, when I was in Shell, looking after standards in oil plant operations, we would often have occasion to say to people RTFM, in which M stood for Manual.

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  17. Counter Registered Senior Member

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    I see problems with your posts:

    Abbreviations: the first letters of words indicating you have just walked into the room.
    Bad language: your mother would be most displeased with this.

    I do not expect you to EVER understand these points so please continue.

    "It's the future. I've tasted it."-Brian Potter, Phoenix Nights.
     
  18. exchemist Valued Senior Member

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    Hmm, maybe you are right.

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  19. Sarkus Hippomonstrosesquippedalo phobe Valued Senior Member

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    ???
    Seriously?
    Where did you learn this pearl of wisdom from?
     
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  20. Michael 345 Valued Senior Member

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    Original post Question above from MR

    Further post Question from Counter above

    Spot the difference between

    Magic Realist

    and

    Counter

    Work out which I was answering re trains

    Patience running thiner
     
  21. origin Trump is the best argument against a democracy. Valued Senior Member

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    9,999
    Are you stupid, is that the problem?
    You told me (in post #15) that my answer to MR was wrong when in fact it was the correct answer. I realize my answer to MR's question can not be applied to other random questions. Do you understand that?
     
  22. Michael 345 Valued Senior Member

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    3,704
    I said it was wrong because it was wrong

    Bullet fired in a vacuum would not speed up

    Nor would it slow down

    It would retain its muzzle velocity forever
     
  23. origin Trump is the best argument against a democracy. Valued Senior Member

    Messages:
    9,999
    You are either unable to follow the conversation or are just not educated enough to realize the correct answer, either way you are not worth the time and effort.
    Ignore...
     

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