At any instant of time t, the displacement of any particle is given by 2 t-1 (SI unit) under the influence of force of 5 N . The value of instantaneous power is (in SI unit):

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Correct answer: D. 10

aligned x & =2 t-1 \ v & = d x d t =2 ~m ~s ^ -1 \ P & =F . v \ & =2 5=10 ~W aligned

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