Physics Q (1 Viewer)

[poWerdrY]

Analyse the changing acceleration of a rocket during launch in terms of the Law of Conservation of Momentum and teh forces exper5ienced by astronauts.

Umm, yeh, so how do you do it?

 

[Leo 100]

Analyse the changing acceleration of a rocket during launch in terms of the Law of Conservation of Momentum and teh forces exper5ienced by astronauts.

Umm, yeh, so how do you do it?

analyse the changing acceleration of a rocket during launch in terms of the:

• Law of Conservation of Momentum
• forces experienced by astronauts
• Law of Conservation of Momentum

• Rocket propulsion is derived from a force pair (as described in Newton’s third law).

• This is an example of how the Law of Conservation of Momentum can be used to analyse rocket motion. The initial momentum of the rocket and its fuel is zero. This sum must be preserved (the Law of Conservation of Momentum). Note that while the mass of fuel burned in a second is much less than the mass of the rocket, the velocity of the hot exhaust gases is much greater than the velocity of the rocket.
  
  
  
  Note also that while the left side of the equation remains quite constant during a burn, the terms on the right side are changing. The mass of the rocket is decreasing significantly as the fuel is burned (typically, 90% of a rocket’s mass is fuel). This means that the velocity of the rocket must increase significantly.
• Forces experienced by astronauts
  
  
  
  Note that two forces act upon an astronaut during launch: the upward thrust (T) as well as the downward weight (W or mg). Newton’s second law can be used to derive a simple expression for acceleration of a rocket that is launched directly up (using the diagram above):
  
• As described above, if the mass of the rocket decreases during flight and the thrust remains constant, the acceleration of the rocket (and astronauts) increases. Thus the force experienced by the astronaut increases. Refer to the graph above to see how the forces change at different times during the flight into orbit around the earth.

Hope that helped http://www.hsc.csu.edu.au/physics/core/space/9_2_2/922net.html#top

 

[poWerdrY]

analyse the changing acceleration of a rocket during launch in terms of the:

• Law of Conservation of Momentum
• forces experienced by astronauts
• Law of Conservation of Momentum

• Rocket propulsion is derived from a force pair (as described in Newton’s third law).

• This is an example of how the Law of Conservation of Momentum can be used to analyse rocket motion. The initial momentum of the rocket and its fuel is zero. This sum must be preserved (the Law of Conservation of Momentum). Note that while the mass of fuel burned in a second is much less than the mass of the rocket, the velocity of the hot exhaust gases is much greater than the velocity of the rocket.
  
  
  
  Note also that while the left side of the equation remains quite constant during a burn, the terms on the right side are changing. The mass of the rocket is decreasing significantly as the fuel is burned (typically, 90% of a rocket’s mass is fuel). This means that the velocity of the rocket must increase significantly.
• Forces experienced by astronauts
  
  
  
  Note that two forces act upon an astronaut during launch: the upward thrust (T) as well as the downward weight (W or mg). Newton’s second law can be used to derive a simple expression for acceleration of a rocket that is launched directly up (using the diagram above):
  
• As described above, if the mass of the rocket decreases during flight and the thrust remains constant, the acceleration of the rocket (and astronauts) increases. Thus the force experienced by the astronaut increases. Refer to the graph above to see how the forces change at different times during the flight into orbit around the earth.

Hope that helped

SWEET!!! ty bro

 

[Forbidden.]

回复: Re: Physics Q

analyse the changing acceleration of a rocket during launch in terms of the:

• Law of Conservation of Momentum
• forces experienced by astronauts
• Law of Conservation of Momentum

• Rocket propulsion is derived from a force pair (as described in Newton’s third law).

• This is an example of how the Law of Conservation of Momentum can be used to analyse rocket motion. The initial momentum of the rocket and its fuel is zero. This sum must be preserved (the Law of Conservation of Momentum). Note that while the mass of fuel burned in a second is much less than the mass of the rocket, the velocity of the hot exhaust gases is much greater than the velocity of the rocket.
  
  
  
  Note also that while the left side of the equation remains quite constant during a burn, the terms on the right side are changing. The mass of the rocket is decreasing significantly as the fuel is burned (typically, 90% of a rocket’s mass is fuel). This means that the velocity of the rocket must increase significantly.
• Forces experienced by astronauts
  
  
  
  Note that two forces act upon an astronaut during launch: the upward thrust (T) as well as the downward weight (W or mg). Newton’s second law can be used to derive a simple expression for acceleration of a rocket that is launched directly up (using the diagram above):
  
• As described above, if the mass of the rocket decreases during flight and the thrust remains constant, the acceleration of the rocket (and astronauts) increases. Thus the force experienced by the astronaut increases. Refer to the graph above to see how the forces change at different times during the flight into orbit around the earth.

Hope that helped http://www.hsc.csu.edu.au/physics/core/space/9_2_2/922net.html#top

oh wow charles sturt the site we all know about

 

[Leo 100]

Re: 回复: Re: Physics Q

oh wow charles sturt the site we all know about

didnt see you offering any suggestions