Transfer of Momentum vs. Algodoo

In this video we can see that there are two boulders of equal size, but different masses. The dark brown is wood, while the grey is stone. The lighter, wood one starts moving toward the heavier stone boulder, and when they collide the lighter boulder is forced backwards, while the the stone boulder starts moving in the other direction. We call this collision a transfer of momentum, which means that the momentum of the wood boulder is transferred to the stone boulder. Momentum can be transferred through many objects as well, like Newton’s cradle. It has many marbles in the middle and when one marble strikes against the side, the marble on the opposite side pops straight out because the momentum of the first marble is transferred through all the other marbles, but when it reaches the end marble, there is no other marble behind it to steal the energy that it just gained, so it pops straight out.