Internal Combustion Engines
If V₁ is the jet velocity and V₀ is the vehicle velocity, then the propulsive efficiency of a rocket is given by

V₁/(V₀ + V₁)
V₀/(V₀ + V₁)
(V₀/V₁)/ [1 + (V₀/V₁)²]
[2(V₀/V₁)]/ [1 + (V₀/V₁)²]

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Internal Combustion Engines
Pick up the wrong statement about supercharging

Supercharging at high altitudes is essential
There can be limited supercharging in petrol engines because of detonation
Supercharging reduces knocking in diesel engines
Supercharging results in fuel economy

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