An automobile engine of mass M accelerates and a constant
power p is applied by the engine. The instantaneous speed
of the engine will be
(a) [Pt /M]¹/² (b) [2Pt /M]¹/²
(c) [Pt / 2M]¹/² (d) [Pt / 4M]¹/²
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Fv=P or Mdtdvv=P
That is ∫vdv=∫MPdt
Hence v=[2Pt/M]1/2
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