Satellites in Circular Orbit

  • Thread starter sandersky
  • Start date
  • #1
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Homework Statement


PROBLEM
What is orbital speed of 2nd satellite?
VARIABLES
  • velocity of satellite 1 is 17000 meters/second
  • radius of satellite 1 to center of planet is 5250000 meters
  • radius of satellite 2 to planet is 8600000 m

Homework Equations


Fc = mv2/r


The Attempt at a Solution


? not a clue

Homework Statement





Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
Doc Al
Mentor
45,052
1,364

Homework Equations


Fc = mv2/r
This is one of the equations you need. What force provides the centripetal force? (That will be the second relationship you'll need.)

Hint: Set up a ratio of v2 to v1
 
  • #3
45
0
try equating gravity and centripetal force then you should be able to rearange the formula to find v?

perhaps this is right if its not i also need help on this question :confused:

Alex
 
  • #4
2
0
I figure it out.
 
  • #5
Ouabache
Science Advisor
Homework Helper
1,340
8
I figure it out.

You've got me wondering...
What is the orbital speed of the second satellite?
How did you find it?
 
  • #6
8
0
satellite

orbital velocity,v= sqrt[gr]

v1=17000 m/s
v2=?
r1=5250000 m
r2=8600000 m

so, v2/v1=sqrt[r2 /r1]
v2=v1 * sqrt[r2/r1]

answer:21,758 m/s
 

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