Question

hello prove that
if momentum is not always constantly as.... Snell law
rehan​

Answer 1

Answer:

Momentum is always considered as only the perpendicular component having an effect. Same when billiard ball collide.

The reason is understood from simple classical mechanics :-

during a collision a normal force always is created always being perpendicular to the surface (to the contact point). so only perpendicular acceleration can happen meaning only the perpendicular component of u can be altered.

Explanation:-

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Answer 2

Answer:

The theory of relativity usually encompasses two interrelated theories by Albert Einstein: special relativity and general relativity. Special relativity applies to all physical phenomena in the absence of gravity. General relativity explains the law of gravitation and its relation to other forces of nature.