[Collisions] Flashcards
1
Q
- Principle of Conservation of Momentum
A
Total momentum is constant or conserved for a closed system or provided there are no external forces. Initial momentum = Final momentum.
pINITIAL = pFINAL. m1u1 + m2u2 = m1v1 + m2v2.
2
Q
- Perfectly Elastic Collision
A
No loss of kinetic energy during the collision. Note total energy and momentum are always conserved.
1⁄2m u 2 + 1⁄2m u 2 = 1⁄2m v 2 + 1⁄2m v 2 + E; E = 0.
3
Q
- Inelastic Collision
A
Some loss of kinetic energy during the collision. Note total energy and momentum are always conserved. 1⁄2m u 2 + 1⁄2m u 2 = 1⁄2m v 2 + 1⁄2m v 2 + E; E > 0.
