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Bullet in the air

  • Thread starter porkok
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porkok

If we shoot bullet to the air (90Degree) it will fall down to same spot or not ? (Without anther force)
Thanks
 

NateTG

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Well, where are you shooting from?

I assume that the bullet is not going more than 6km/s?
 

porkok

From the ground (yes not over 6km/s). Could you give me answer and explanation ?
Thanks
 

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:

porkok

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 ?
 

porkok

We did not talk about another factor. (No other facetor in this situation)
 

NateTG

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Is the earth stationary?
 

porkok

earth is still moving around itself
 

NateTG

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So, would the bullet move with the earth after you shot it?
 

HallsofIvy

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Yes. Conservation of momentum.
 

porkok

Could you explain about conservation of momentum ? Thanks
 

NateTG

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Originally posted by HallsofIvy
Yes. Conservation of momentum.
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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