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Can the law of momentum conservation ever be violated? (A) No (B) Yes, if there are more than two particles (C) Yes, when the forces between the particles are varying in time (D) Yes, if the two particles stick together after a collision

Can the law of momentum conservation ever be violated?
(A) No
(B) Yes, if there are more than two particles
(C) Yes, when the forces between the particles are varying in time
(D) Yes, if the two particles stick together after a collision

Grade:upto college level

2 Answers

udit maniyar
46 Points
8 years ago
NO the law of momemtum consevation cannot be violated 
(B) Even though there are 2 particles law of conservation is not violated
(C) Even though the forces are varying in time  since they internal forces they cancel each other
(D) Even when they stick momemtum is conserved
 
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Kevin Nash
askIITians Faculty 332 Points
8 years ago
The correct option is (A) No.
There is a deep theoretical connection between conserved quantities and symmetries of nature. The law of conservation of linear momentum is connected to the spatial symmetry of nature, which requires that an experiment done at one location should give the identical result as the same experiment done at another location.
The conservation of energy, which is connected to temporal (time) symmetry, the result of an experiment done today should agree with the result of the same experiment done yesterday. Because of these connections, we believe that these two conservation laws are universally valid. Therefore the law of conservation of linear momentum cannot ever be violated on the large scale.
From the above observation we conclude that, option (A) is correct.

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