Calculate the thrust acting on a rocket

  • Thread starter ASidd
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  • #1
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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??
 

Answers and Replies

  • #2
HallsofIvy
Science Advisor
Homework Helper
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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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