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A particle moves with constant momentum = (10 kg. m/s) The particle has an angular momentum about the origin of = (20 kg. m2/s) when t = 0 s. (a) The magnitude of the angular momentum of this particle is (A) decreasing. (B) constant. (C) increasing. (D) possibly nut not necessarily constant. (b) The trajectory of this particle (A) definitely passes through the origin (B) might pass through the origin. (C) will not pass through the origin, but it is uncertain how close it will pass to the origin. (D) will not pass through the origin, but one can calculate exactly how close it will pass to the origin.

A particle moves with constant momentum  = (10 kg. m/s) The particle has an angular momentum about the origin of  = (20 kg. m2/s)when t = 0 s.
(a) The magnitude of the angular momentum of this particle is
(A) decreasing.        
(B) constant.                    
(C) increasing.         
(D) possibly nut not necessarily constant.
(b) The trajectory of this particle
(A) definitely passes through the origin
(B) might pass through the origin.
(C) will not pass through the origin, but it is uncertain how close it will pass to the origin.
(D) will not pass through the origin, but one can calculate
exactly how close it will pass to the origin.

Grade:upto college level

1 Answers

Abhinav
askIITians Faculty 387 Points
8 years ago
(a) possibly but not necessarily constant.
as in case of trajectories like y=20 m , x=20 m or particle revolves in circle of diameter 20 around origin etc.

(b)will not pass through the origin, but it is uncertain how close it will pass to the origin.
as we cannot calculate trajectory with given information.

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