Recent content by Danik

its in seconds. so the T is in 25,200 s

what do u mean?

your right, so if i do that then i should come up with r=GMT^2/4п (if I am not mistaken). what should i do with the T? should i keep it at 7 hrs or should i convert it to 420 min or 25,200 s? If i keep the hrs then i should come up with 2.05*10^15 m

well, my first guess was Fc= mv^2/r . that won't work because of Fc and v which is like double unknown. I tried puttin GmM/mv^2 and that didnt work also ... =/ I just can't seem to think of any of the laws that work

1. Basically it tells me that Mars has a mass of 8*10^23kg.Phobos, its closest moon, whips around planet in 7 hrs. How far from Mars is Phobos? I got that m=8*10^23 and T= 7 hrs . I am pretty sure i need to find the radius. my only problem is that I can't find the formula where i can...