• Support PF! Buy your school textbooks, materials and every day products Here!

Rocket Exhaust Gases

  • Thread starter sloanmp
  • Start date
  • #1
3
0
A rocket with initial mass of 7.30×103 kg is fired in the vertical direction. Its exhaust gases are ejected at the rate of 6.00×101 kg/s with a relative velocity of 2.100×103 m/s. What is the initial acceleration of the rocket? What is the acceleration after 29 s have elapsed?
 

Answers and Replies

  • #2
163
0
A rocket with initial mass of 7.30×103 kg is fired in the vertical direction. Its exhaust gases are ejected at the rate of 6.00×101 kg/s with a relative velocity of 2.100×103 m/s. What is the initial acceleration of the rocket? What is the acceleration after 29 s have elapsed?
I think you will first need to find such a thing like the Thrust of the rocket, which can be obtained by:

[tex]F_s dt = dm\cdot\vector{v}_r[/tex]

With the thrust, which is clearly a force, you can solve for F =ma, m being the initial one (take into account that your rocket is losing mass as it goes up).
Hint: The total force is the thrust + the gravity!
 

Related Threads on Rocket Exhaust Gases

  • Last Post
Replies
15
Views
129
Replies
9
Views
6K
  • Last Post
Replies
2
Views
8K
  • Last Post
Replies
1
Views
528
  • Last Post
Replies
4
Views
13K
  • Last Post
Replies
0
Views
2K
  • Last Post
Replies
5
Views
746
  • Last Post
Replies
1
Views
961
  • Last Post
Replies
4
Views
31K
  • Last Post
Replies
1
Views
4K
Top