Projectile Hang Times

[schmanman]

unless you took your cannon up in a skydiving plane, then went to the maximum altitude possible in that plane, then shot the gun straight up, and the projectile had a parachute. . no, I'm kidding, but gort, how do you figure these things out. I mean, I'm a freshman, and am in honors classes, and am taking geometry, so I'm not stupid, but how do you figure these things out?

[boilingleadbath]

10 minutes up then down = 5 minutes up.
5 minutes = 300 seconds
300 seconds * 32 f/s/s = 9,600 f/s
9,600/1100 = mach 8.7

That, unless I'm ignoring some possibility, is (roughly) the lowest velocity that can give you that hang time.
It assumes a drag-free projectile.

Or, at least, when using a dumb object.
Projectiles with lifting surfaces (wings) or parachutes are a different thing altogether.

[sgort87]

Yeah, what he said.

Thanks BLB, I really didn't feel like typing that stuff out. There's more that you should really show, but let's hope he accepts your explanation as it is.

[brumby]

sgort, how did you figure that out?... I would like to find out how fast my cannon shoots