Satellite and gravitational force

  • Thread starter fa08ti
  • Start date
  • #1
32
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a 500 kg satellite experiences a gravitational force of 3000 N, while moving in a circular orbit around the earth.
a: find the radius of the circular orbit
b: find the speed of the satellite
c: find the period of the orbit

attempt

a:
g= GM/r^2
r=sqrt(GM/g)
r= 3.33 x 10^-6 m

am i right?
 

Answers and Replies

  • #2
380
1
Think about your answer for a second... does 10^-6m make any physical sense?
 
  • #3
32
0
not at all...where did i go wrong?
 
  • #4
380
1
Your equation is missing a term for the mass of the satellite:

[tex] F_{G} = \frac{GMm}{r^{2}} [/tex]
 
  • #5
32
0
thanks a lot!
 

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