AverageCitizen
Explorer
hossrex said:WTF? No. You're entirely neglecting the force of energy.
With enough applied force, an arrow fired perpendicular to the ground would *never* again touch the ground (although it would eventually escape the earths gravity).
http://en.wikipedia.org/wiki/Sniper#Snipers_in_warfare
This link says the world record for a sniper kill is just over a mile and a third (2430 yards) with a flight time of 4.5 seconds.
Unless you're suggesting it would take 4.5 seconds for a bullet to hit the ground if dropped from nose level.
Now *THAT* would be a magic bullet.
No, he's right. Lateral momentum doesn't reduce the pull of gravity. You have to remember that even the slightest arc in the shot would increase flight time. Snipers account for this.
The only exception that I can think of would be a bullet traveling so fast that it would apply its lateral force directly against the earth's gravitational pull before it lost its velocity. Which means it would have to get past the horizon and then out into space before the pencil hits the ground.