Hey guys, I confused about something,please help me. I have a bullet and its diameter is 0.5 inches. its speed is 400 foot /sec. It makes one complete rotation in the gun 120 mm per turn and length of the gun is 1.5 meter. How can I calculate the rotational and angular speed? -I used a formula for rotational speed; R=2pi.n n=(number of the rotation) which is 1.5 meter/1.2 mm. - Angular speed; w=v/r w=400 ftsec/0.5inch Are my formulas and calculations correct?