Задача id12203

A gun is mounted on a railway platform moving by inertia at speed v. The gun barrel is directed towards the movement of the platform and raised above the horizon. The gun fires, after which the speed of the platform decreases by 3 times. Find the velocity vSI of the projectile relative to the Earth. Projectile mass - m. The mass of the platform with the gun is M.

Detailed solution. Format gif