question_answer

A particle moves in the x-y plane under the action of a force \[\overrightarrow{F}\] such that the value of its linear  momentum \[\overrightarrow{P}\] at any time t is \[{{p}_{X}}=2\] cos t and  the angle \[\theta \] between \[\overrightarrow{F}\] and \[\overrightarrow{P}\] at any time t will be

A)  \[90{}^\circ \]                                    

B) \[0{}^\circ \]

C) \[180{}^\circ \]                 

D)        \[30{}^\circ \]