Question

HELP!

Answer 1

@PsiSquared

Answer 2

@douglaswinslowcooper

Answer 3

distance between moons = oribtal distance of futher moon - orbital distance of closer moon=3.0e8[m]-2.0e8[m]=1.0e8[m].

Orbital radius is taken from the moons surface. However, to calculate orbits and things useing Keplers laws one must treat the moons as point masses. This means we have to add both moon radi together, then add the sum to the difference above.

r1+r2=(3.5+2.0)e5[m]=5.5e5[m].
Add to difference above; 5.5e5[m]+1.0e8[m]= 1.0055e8[m]

Recall Newtons general formula for gravity:

\[F=\frac{ G*m1*m2}{ r ^{2} }\]

Use the distance computed above for r
Use the given masses for moon A and moon B in the table.
Answer should be in correct units. [kg^2 terms cancle as well as m^2 so the answer comes out as Newtons.

Do the work and post back if it works and if so the answer