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

Q: 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

Ans: (b)