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In jet propulsion of ships, when the inlet orifices are at right angles to the direction of motion of the ships, the efficiency of propulsion η is(a) \(\cfrac{2u^2}{V+u}\) (b) \(\cfrac{2Vu}{(V+u)^2}\) (c) \(\cfrac{2u}{(V+u)^2}\) (d) \(\cfrac{2Vu}{V+u}\) where; V = Absolute velocity of the issuing jet, u = Velocity of the moving ship |
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Answer» Correct option is (b) \(\cfrac{2Vu}{(V+u)^2}\) |
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