DA>
MSGID: 1:109/120.0 31840158
DA>MM> I am coming into this conversation in the middle, so if this point
DA>MM> has been made please forgive me.
DA>MM> A bullet discharged from a firearm aimed straight up in the air will
DA>MM> return to the earth at approximately the same speed as it left the
DA>MM> muzzle of the firearm.
DA>No it won't. What you describe can only happen in a vacuum. In air, the
DA>bullet accelerates downward until the air resistance equals the force of
DA>gravity. Then it's velocity remains constant.
Not to mention that because of the rotational velocity of the earth stays 
the same on the bullet as the rifle, when the bullet has a longer arm at 
the apogee of flight, the rifle will be moving out _ahead_ of the bullet.  
Assuming a 1 mile apogee and approximately 40 second flight time, at a 
latitude of 45ø, well suppose an average differential of .15fps since 
most of the duration of flight will be at the top half of the flight, 
that means the bullet should fall about six feet to the rear of the 
direction of planetary rotation.
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