Calculate the thrust acting on a rocket

  • Thread starter Thread starter ASidd
  • Start date Start date
  • Tags Tags
    Rocket Thrust
Click For Summary
SUMMARY

The thrust acting on a rocket can be calculated using the principle of conservation of momentum. Given a 20,000 kg rocket that exhausts gases at a rate of 700 kg/sec with a velocity of 300 m/s, the thrust (T) can be determined using the formula T = mass flow rate × exhaust velocity. Therefore, T = 700 kg/sec × 300 m/s, resulting in a thrust of 210,000 N. This calculation is essential for understanding rocket propulsion dynamics.

PREREQUISITES
  • Understanding of conservation of momentum in physics
  • Familiarity with thrust calculations in rocket science
  • Basic knowledge of mass flow rate and its implications
  • Ability to manipulate and apply Newton's second law of motion
NEXT STEPS
  • Study the principles of rocket propulsion and thrust generation
  • Learn about the equations governing conservation of momentum
  • Explore advanced topics in fluid dynamics related to rocket exhaust
  • Investigate the impact of varying mass flow rates on thrust
USEFUL FOR

Aerospace engineers, physics students, and anyone interested in rocket propulsion and dynamics will benefit from this discussion.

ASidd
Messages
72
Reaction score
0

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??
 
Physics news on Phys.org
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?
 

Similar threads

  • · Replies 10 ·
Replies
10
Views
2K
  • · Replies 1 ·
Replies
1
Views
1K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 9 ·
Replies
9
Views
2K
  • · Replies 42 ·
2
Replies
42
Views
6K
  • · Replies 22 ·
Replies
22
Views
3K
  • · Replies 12 ·
Replies
12
Views
2K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 10 ·
Replies
10
Views
9K
  • · Replies 2 ·
Replies
2
Views
1K