A blue and a green billiard ball, each with a mass of 0.15 kg, collide directly. Before the collision, the blue ball had a speed of 3 m/s while the green ball had a speed of 2 m/s. After the collision, the green ball stays in place while the blue ball continues in motion.
In 3-4 sentences, represent the situation before and after the collision and calculate the speed of the blue ball after the collision.
1 answer
Before the collision, the blue ball was moving at 3 m/s and the green ball was moving at 2 m/s. After the collision, the green ball stayed in place while the blue ball continued in motion. Using the conservation of momentum, the speed of the blue ball after the collision can be calculated as 4 m/s.