Originally Posted by
OldBob47
SH54,
I can't beleive you say such things! Perhaps you should get your head INTO some of those books you dislike so much. The gravitational constant for this planet is 32 fps/sec. Your penny and your arrow drop at the same rate (or thereabouts. This ignores planing from the broadhead and fletching). Where speed enters into the equation is that it determines time of flight, which multiplied by the gravitational constant, determines actual drop. Now the penny and the arrow do not begin dropping at 32FPS, so close range drop is less. But however you split these hairs, the 1800 FPS muzzleloader ball will be traveling at 6 times the speed of your arrow, hence your drop at normal ranges (0-50 yards) will be 1/6 of the arrow's drop, since the time of flight is 1/6 that of the arrow. And that's why I originally stated that the idea of a flat-shooting arrow is ludicrous.
Crack open the books. I don't expect you're going to come back here and say, "You're right, Bob." But at least you'll be better informed than you are right now.
OldBob
Of course I'm not going to come back on here and say that since you are so incredibly incorrect it's just funny. In trying to "sound" smart with your "gravitational constant" statement you inadvertently showed your hand. Considering the GC of this planet is in NO way calculated in fps as an ending formula, your whole little comparison calculation went 100% out the window. Considering gravity is calculated through MASS (which is why you take the weight of an object into the calculation of gravity effects) not SPEED.
Trying to "sound" smart and actually being smart are 2 separate things Bob. Now, if you want to know about how to formulate trajectory using the actual GC formula there are a few variations of said formula for doing so I will point you to the wiki page to have access to a few of the formulas.
https://en.wikipedia.org/wiki/Gravitational_constant
Now dust off your physics books and figure it out.