Phys205A_Lecture26

Physics for Scientists & Engineers with Modern Physics (4th Edition)

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
Lecture 26 Chapter 9 Rocket Propulsion
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Brief history of rockets
Background image of page 2
Rocket Propulsion z The operation of a rocket depends upon the law of conservation of linear momentum as applied to a system of particles, where the system is the rocket plus its ejected fuel
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
How it works z The initial mass of the rocket plus all its fuel is M + m at time t i and speed v z The initial momentum of the system is i = (M + m) pv r r
Background image of page 4
Rocket Propulsion, 3 z At some time t + t , the rocket’s mass has been reduced to M and an amount of fuel, m has been ejected with the speed v z The rocket’s speed has increased by v
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Rocket Propulsion, 4 z Because the gases are given some momentum when they are ejected out of the engine, the rocket receives a compensating momentum in the opposite direction z Therefore, the rocket is accelerated as a result of the “push” from the exhaust gases z In free space, the center of mass of the system (rocket plus expelled gases) moves uniformly, independent of the propulsion process
Background image of page 6
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 13

Phys205A_Lecture26 - Lecture 26 Chapter 9 Rocket Propulsion...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online