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  1. If the force on a rocket moving with a velocity of 300 m/sec is 345 N, then the rate of combustion of the fuel, is
    1. ​0.55 kg/sec
    2. 0.75 kg/sec
    3. ​1.15 kg/sec
    4. 2.25 kg/sec
Correct Option: C

Velocity of the rocket (u) = 300 m/s and force (F) = 345N. Rate of combustion of fuel

dm
 =
F
 = 1.15 kg/sec
dtu


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