A particle of mass 'M' is moved rectilinearly under constant power P 0 . At some instant after the start, its speed is v and at a later instant, the speed is 2v. Neglecting friction, distance travelled (in m) by the particle as its speed increases from v to 2v is 7x. Find x (take P 0 = 4 watt, M = 12 kg, v = 3m/s):
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Sol. P 0 = Fv
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