Find mass of mars given period of moon orbit and radius of orbit

Click For Summary
SUMMARY

The mass of Mars can be calculated using the orbital period and radius of its moon. Given a moon orbiting Mars with a period of 459 minutes and a radius of 9.4 x 106 m, the mass of Mars is determined to be 6.5 x 1023 kg. The relevant equations utilized include gravitational force and orbital velocity formulas, specifically v = √(Gm/r) and v = ωr. The gravitational constant G is essential for these calculations.

PREREQUISITES
  • Understanding of Newton's law of gravitation
  • Familiarity with orbital mechanics
  • Knowledge of the gravitational constant (G)
  • Ability to manipulate equations involving circular motion
NEXT STEPS
  • Study the derivation of Kepler's laws of planetary motion
  • Learn about the gravitational constant (G) and its applications
  • Explore the concept of orbital velocity and its calculations
  • Investigate the relationship between mass, radius, and period in celestial mechanics
USEFUL FOR

Astronomy students, physics enthusiasts, and anyone interested in celestial mechanics and gravitational calculations will benefit from this discussion.

buttermellow
Messages
8
Reaction score
0

Homework Statement



Given data: A moon of Mars orbits with a period of 459 minutes. The radius of the moon's orbit is 9.4x10^6 m. What is the mass of mars?



Homework Equations





The Attempt at a Solution



The only relevant equation I could find was Fmars on moon= (G*m1*m2)/(r2)

I have the radius, but to solve I would need the mass of the moon and the gravitational force. Could I use F=mv2/r ? Or how about v= \sqrt{}GM/r ?
 
Physics news on Phys.org
Alright, I actually figured it out myself.

v= \sqrt{}Gm/r and v=\omega*r

so the mass of Mars is 6.5*10^23 kg!
 

Similar threads

Replies
1
Views
2K
  • · Replies 30 ·
2
Replies
30
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
Replies
5
Views
2K
  • · Replies 12 ·
Replies
12
Views
2K
  • · Replies 18 ·
Replies
18
Views
3K
  • · Replies 11 ·
Replies
11
Views
3K
  • · Replies 6 ·
Replies
6
Views
3K
  • · Replies 10 ·
Replies
10
Views
2K
Replies
21
Views
3K