1.

A particle moves in XY plane under the influence of a force such that its linear momentum is barP = A[(coskt)hati + (sin kt)(-hatj)] , where A and k are positive constants.

Answer»

 The MAGNITUDE of the FORCE is Ak
 The angle between force and momentum is`pi/2`
 The angle between force and momentum is it `pi`
 The angle between acceleration and velocity VECTORS is ALWAYS `pi//2`

Answer :A::B::D


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