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One-Dimensional Collisions

Perfectly elastic collisions do occur however between

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Unformatted text preview: und when two balls strike each other. Perfectly elastic collisions do occur, however, between atomic and subatomic particles. Elastic and perfectly inelastic collisions are limiting cases; most actual collisions fall into a range between them. We can summarize the types of collisions as follows: • • • In an elastic collision, both momentum and kinetic energy are conserved. In an inelastic collision, momentum is conserved but kinetic energy is not. In a perfectly inelastic collision, momentum is conserved, kinetic energy is not, and the two objects stick together after the collision, so their final velocities are the same. Finally, there are two tips that you can follow: 1. Momentum and Kinetic Energy in Collisions: The momentum of an isolated system is conserved in all collisions. However, the kinetic energy of an isolated system is conserved only when the collision is elastic. 2. Inelastic vs. Perfectly Inelastic Collisions: If the colliding particles stick together, the collision is perfectly inelastic. If they bounce off each other (and kinetic energy is...
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