If velocity of bullet when it exits the barrel is 20m/s, its spinning speed (in rad/s) is _____________

Question

A bullet spin as the shot is fired from a gun. For this purpose, two helical slots as shown in the figure are cut in the barrel. Projections A and B on the bullet engage in each of the slots. Helical slots are such that one turn of helix is completed over a distance of 0.5m. If velocity of bullet when it exits the barrel is 20m/s, its spinning speed (in rad/s) is _____________         

Answer 1

$\therefore$ The spining speed i.e., the Angular velocity of the bullet is 251.32 ras/sec