A spacecraft is in orbit around Mars. Suppose that it was previously observed to have speed 5 km/sec while at a distance r = 5000 km from planet center. Suppose it is now at a distance r = 6000 km from planet center. What speed would you expect it to be traveling at now? Note that for Mars we have GmMars = µMars ' 42, 828 km3 /sec2

Respuesta :

Answer:

V' = 4.56Km/s

Explanation:

We can use the formula of Orbital Speed, who say,

[tex]V = \sqrt{\frac{GM}{r}}[/tex]

The relative velocity is given by,

[tex]V' = \sqrt{\frac{GM}{r'}}[/tex]

We need to find the relation between the two speeds,

[tex]\frac{V'}{V} = \sqrt{\frac{GM}{r}*\frac{r'}{GM}}[/tex]

[tex]\frac{V'}{V} = \sqrt{\frac{r}{r'}}[/tex]

[tex]V' = V \sqrt{\frac{r}{r'}}[/tex]

Substituting,

[tex]V' = (5)*\sqrt{\frac{5000}{6000}}[/tex]

[tex]V' = 4.56Km/s[/tex]