Question

A rirfle barrel has a spiral groove which imparts spin to the bullet why

Answer 1

Explanation: Know about guns  info, Etc. ....

A rifle Barrel has a spiral groove which imparts spin to the bullet. Why? Spin gives angular momentum to the bullet, which gives more stability against local air flow and pressure fluctuation, like gyroscope. It also helps bullet to penetrates more to the targets because of the same spin angular momentum