sounds like fun.

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Yes!

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Great! As long as you are even a bit systematic about it, the numbers will be meaningful. I'm personally most interested in maximum range for a given projectile regardless of style, but there are a lot of subtle interelated things going on that we can figure out given enough material to work with. The more slingers participate the better, as one of the biggest variables is the person throwing the projectile.

Matthias

Yep, it's true if you're in a vacuum.  As the shot goes straight up, it loses (on earth) velocity at the rate of 32ft/sec/sec until it stops and begins falling.  Then it picks up velocity at the rate of 32ft/sec/sec.  It falls the same distance it went up (duh!), so the velocity at impact is the same as the initial muzzle velocity.

Again, all this assumes a vacuum.  In air, the numbers will change, but I suspect with a little piece of lead, the impact velocity is still a big portion of the initial muzzle velocity.

mgreenfield

Matthias;
Here is my week end report of distances for various ammo's and weight's
heres what I took with me to the abandoned air field
6 foos balls weight about 1.5 ounces or 42.5 grams
6 egg shaped stones all selected for their weight of
3 ounces or 85 grams
6 clay glands 3 ounces or 85 grams
6 weighted golf balls 4 ounces each or 162.50 grams
6 lead egg sinkers 6 ounces or 170 grams
I was totally surprised by what gave me the most distance
these were all cast under hand. my over hand style produce much less distance
the following distances were gained by casting all ammo
out in one group, say the foo's balls then pace out to them and then back averaging the two pace counts then converting the pace count to yards. then averaging all 6 for each group
foo's balls 96.42 yards or 88.17 meters
stones 193.9 yards or 177.30 meters
clay 162.5 yd. or 148.59 meters
weighted golf balls 214.5 yards or 196 meters
egg sinkers 216 yards or 198.15 meters
I did not suspect that the six out egg sinkers would go the furthest
next time I am going to try small egg sinkers and see if i can get that distance up.
one more note most of my shot's landed in a ten foot radius per group. that kinda impressed me.
these were just some different ammo i had laying around except four the weighted golf ball they were weighted heavier  I altered the weight before heading out
oh one last thing  my pace count is converted by paces multiplied length of pace (39 inches)
sum divided by standard (36 inches) to get yards