Question

in an isolated system, a red ball of mass m moves to the right with speed v. it strikes a green ball, of mass 2m, which was initially stationary. after the collision, the red ball remains stationary. how does the green ball move? to the right, with speed v2

Answer 1

When a red ball of mass m collides with a green ball of mass 2m in an isolated system, the green ball moves to the right with the same speed as the red ball initially had.

Step-by-step explanation:

In an isolated system, when a red ball of mass m collides with a green ball of mass 2m, the red ball comes to a stop and the green ball moves to the right with a speed v2.

This can be explained using the principle of conservation of momentum. Before the collision, the total momentum of the system is given by the sum of the momentum of the red ball and the green ball, which is mv. After the collision, the total momentum is still conserved, but the momentum of the red ball is zero. Therefore, the momentum of the green ball is mv, which implies that it moves to the right with the same speed v as the red ball initially had.