Calculate the thrust acting on a rocket

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    Rocket Thrust
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To calculate the thrust acting on a rocket, the conservation of momentum principle is essential. The rocket's mass is 20,000 kg, and it exhausts gases at a rate of 700 kg/sec with a velocity of 300 m/s. The momentum of the exhaust gases can be calculated as the product of mass flow rate and exhaust velocity, which equals 210,000 kg·m/s. This momentum must equal the thrust produced by the rocket's engines. Thus, the thrust can be determined by using the relationship between momentum and thrust in this context.
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Homework Statement


A 20,000 kg rocket exhausts gasses at a constant 700 kg/sec at 300 ms^-1
Deduce the thrust applied to the rocket by its engines

Homework Equations



The only equation I know is a= T- mg/m

Where T= thrust
a=acceleration
m=mass

The Attempt at a Solution


I don't know any other formulas and I can't use the one above because I don't have the acceleration
Please help??
 
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Use "conservation of momentum". You can calculate the momentum of the exhaust gases from the information given and that must be equal to the momentum of the rocket itself. What thrust will give that mometum?
 

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