Question

What is collision? Explain elastic and inelastic collision.
Write down the number of significant figures in the following:
0.003 m2, 6.4 x 106 m, 1.6 x 10-19 C, 9.1 x 10-31 kg.

Answer 1

Collision, also called impact, in physics, the sudden, forceful coming together in direct contact of two bodies, such as, for example, two billiard balls, a golf club and a ball, a hammer and a nail head, two railroad cars when being coupled together, or a falling object and a floor.

A perfectly elastic collision is defined as one in which there is no loss of kinetic energy in the collision. An inelastic collision is one in which part of the kinetic energy is changed to some other form of energy in the collision.

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