Задача id10296

A box of sand with a mass of 9 kg, sliding down a smooth inclined plane, is hit by a horizontally flying cannonball with a mass of 3 kg and gets stuck in it. Find the speed of the box immediately after the impact of the cannonball, if immediately before the impact the speed of the box was 6 m/s, and the speed of the cannonball was 12 m/s. The angle of inclination of the plane to the horizon is 60°.

Detailed solution. Format jpg