Usually, those diagrams are fixed ... to witness concepts like electrical currents and momentum in action in addition to ...

They collide with speeds and directions as shown in this diagram. The following steps ... the collision was elastic or not. \(\text{total momentum before} = {\text{total momentum after}}\) ...

Momentum Space vs. Position Space Momentum space is a fundamental concept in physics that describes electron motion in terms of energy and direction, rather than their exact physical position.