| Term | Definition |
| momentum p= | mv, tendency for an object to continue moving in its present direction, VECTOR, collision problems |
| elastic collision | all mechanical forces are conserved, conservation forces, K+U=K+U |
| inelastic collision | not conserved, non conservative forces, permanent deformation, increase in temperature |
| impulse | Favgdeltat=deltamv, remember with F vs time graphs |
| rest mass energy | E=mc^2 |
| inelastic collision equation | pxi=pxf, pyi=pyf |
| alpha | 4/2 a |
| beta | 0/-1e |
| positron | 0/1e |
| gamma | 0/0y |
| decay/emission | on the other side of equation |
| capture | on the same side |