Multiple choice help (1 Viewer)

[didi_]

Could someone show me how they get the answer for:



Thanks heaps

 

[AnimeX]

Hi you use the relationship T^2 / r^3 (Kepler's third law IIRC), since they all orbit the sun (central body) they will all have equal ratios. ie. Period venus square / radius earth cubed = period satturn squared / radius satturn cubed

Have a go at it.

 

[didi_]

Oh ok so we don't need to worry about the Mass because of they all orbit the one central body?

Yes, got it, thank you