Question

Q.what is the definition of collision in physics ?

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Answer 1

Answer...

Collisions involve forces 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.

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Answer 2

when two bodies comes in same direction with some velocity they collide wit each other this process is known as collision.
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