A rocket burns 0.4 kg of fuel per second and ejects out gas with a velocity of 8 km s-1. Calculate the force exerted by the ejected gas on the rocket.
Step 1: Given data
Rate of change of mass of fuel
The velocity of gas when ejecting out [Since, 1 km= 1000 m ]
Step 2: Finding the force exerted by the ejected gas on the rocket
The force exerted by the ejected gas on the rocket can be given as below:
Rate of change of mass of fuel Velocity of gas when ejecting out
Substitute the given values.
Thus, the force exerted by the ejected gas on the rocket is 3200 N.