Collision of Elastic Bodies | Engineering Mechanics | Mechanical/Civil Engineering

Описание: Real Life Application:

1. Design of airbag installed in cars at the time of crashing of it.
2. The crumble zone provided in automobiles to prevent damage in crashing.
3. The design of baseball and cricket bat.
4. The billiard ball game setup.

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Explanation:

The collision is a short-duration interaction between two bodies or more than two bodies simultaneously causing a change in motion of bodies involved due to internal forces acting between them during this. Collisions involve forces (there is a change in velocity). All collisions conserve momentum. Collisions are of three types:
1. Perfectly elastic collision
2. Inelastic collision
3. Perfectly inelastic collision.
Specifically, collisions can either be elastic, meaning they conserve both momentum and kinetic energy, or inelastic, meaning they conserve momentum but not kinetic energy. An inelastic collision is sometimes also called a plastic collision.
A “perfectly inelastic” collision OR “perfectly plastic" collision is a limiting case of inelastic collision in which the two bodies stick together after impact.
The degree to which a collision is elastic or inelastic is quantified by the coefficient of restitution, a value that generally ranges between zero and one. A perfectly elastic collision has a coefficient of restitution of one; a perfectly inelastic collision has a coefficient of restitution of zero.
The coefficient of restitution e = (Relative velocity of separation/ Relative velocity of approach)

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