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Bullet in the air

  1. Nov 6, 2003 #1
    If we shoot bullet to the air (90Degree) it will fall down to same spot or not ? (Without anther force)
    Thanks
     
  2. jcsd
  3. Nov 6, 2003 #2

    NateTG

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    Well, where are you shooting from?

    I assume that the bullet is not going more than 6km/s?
     
  4. Nov 6, 2003 #3
    From the ground (yes not over 6km/s). Could you give me answer and explanation ?
    Thanks
     
  5. Nov 6, 2003 #4

    NateTG

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    6km/s is Earth escape velocity. I think you'll find that the problem specifies that the bullet is being shot from the surface of the Earth.

    If you shot the bullet straight up out of a moving car, would it come down and hit you? What if the car was turning? What if the someone stomped on the brakes?
     
    Last edited: Nov 6, 2003
  6. Nov 6, 2003 #5
    Yes the bullet shot from the surface of the earth and pistol is not moving. So it should fall down in the same spot ,right ?
     
  7. Nov 6, 2003 #6
    We did not talk about another factor. (No other facetor in this situation)
     
  8. Nov 6, 2003 #7

    NateTG

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    Is the earth stationary?
     
  9. Nov 6, 2003 #8
    earth is still moving around itself
     
  10. Nov 6, 2003 #9

    NateTG

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    So, would the bullet move with the earth after you shot it?
     
  11. Nov 6, 2003 #10

    HallsofIvy

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    Yes. Conservation of momentum.
     
  12. Nov 7, 2003 #11
    Could you explain about conservation of momentum ? Thanks
     
  13. Nov 7, 2003 #12

    NateTG

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    Actually, since the earth is spinning, the reference frame is accelerated, so the bullet would not be moving with the earth.
     
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