In the 2000-2200 fps range.
According to a couple of different sources, the "average" bullet fired from an AK travels about 2300 feet per second.
If by flip you mean tumble in the air then it depends on the type of AK that is being fired. If the AK is cheaply made and has a low quality barrel then the bullet may tumble in the air. Quality AK47s do not have this problem.
7.62x39mm
7.62x39
The AK-47 shoots a 7.62 x 39mm bullet. The 39mm indicated the length of the brass/steel case.
The AK-47 uses the 7.62x39mm round. Note that the AK-74, a similar firearm uses the different 5.45x29mm round.
Depends on what you mean. 7.62 is the diameter of the bullet in millimeters, 39 is the overall length of the cartridge in millimeters. That particular cartridge can be fired from various rifles, but an AK-47 is a common example.
7.62×39mm
Ammo varies in weight & power but most AK-47s work with a muzzle velocity of around 2,346 feet per second.
No. different cartridge
Best left to a gunsmith
Very small trees.