A particle moves in the X Y plane under the influence of a force such that its is linear momentum P t A i cos kt j sin kt where

Question

A particle moves in the X Y plane under the influence of a force such that its is linear momentum P t A i cos kt j sin kt where A and k are constants The angle between the force and the momentum is UPSEAT 2000 IIT JEE 2007 a 0 c 45 b 30 d 90

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