[Home > Collide > Same into Same]
Here is a video clip of a cart moving in from the right, that will collide with the cart which is sitting at the middle of the track. This is a special case collision: both carts have the same mass.
Notice what happens after the collision: the cart that was initially moving, is now stopped. And the cart that was initially stopped, is now moving. It's a perfect transfer of momentum from one cart to the other. (Well, OK, the cart that was initially moving does move slowly to the right after the collision, but nothing's perfect!)
This is what you get if you collide two same-type vehicles together on this page.