#$&* course PHY 201 4/19 about 7:20 pm I completed PHeT 8.7 in Assignment 23. Pretty interesting to play around with. One thing that I did that I thought was interesting to see in action, was I lined the two objects motion along horizontal. One object had very high mass and small velocity. The other object, very small mass and large velocity. It appeared that the smaller mass with higher velocity might overcome the larger object and accelerate it in the opposite direction but it did not. The velocity vectors did not change at all and thus also showed that the momentum of the objects were the same following the collision. Overall, very neat to see in action.