If the force on a rocket moving with a velocity of 300 m/s is 210 N, then the ra

Question

If the force on a rocket moving with a velocity of 300 m/s is 210 N, then the rate of combustion of the fuel is

Options:

A . 0.7 kg/s

B . 1.4 kg/s

C . 0.07 kg/s

D . 10.7 kg/s

Answer: Option A
:
A
Force on the rocket

= \frac{u d m}{d t} ∴

Rate of combustion of fuel

(\frac{d m}{d t}) = \frac{F}{u} = \frac{210}{300} = 0.7 k g / s

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