Problem 1.45

A shell acquires the initial velocity \(v=320 \mathrm{~m} / \mathrm{s}\), having made \(n=2.0\) turns inside the barrel whose length is equal to \(l\) \(=2.0 \mathrm{~m} .\) Assuming that the shell moves inside the barrel with a uniform acceleration, find the angular velocity of its axial rotation at the moment when the shell escapes the barrel.