A particle moves in the \( x y \)-plane under the action of a force \( \boldsymbol{F} \) such th...

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A particle moves in the \( x y \)-plane under the action of a force \( \boldsymbol{F} \) such that the components of its linear momentum \( \boldsymbol{p} \) at any time \( t \) are \( p_{x}=2 \cos t, p_{y}=2 \sin t \). The angle between \( \boldsymbol{F} \) and \( \boldsymbol{p} \) at time \( t \) is
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