Help w/ simple dimensional analysis

[CocoonOHorror]

Homework Statement

where F is the magnitude of the gravitational attraction on either body, m_1 and m_2 are the masses of the bodies, r is the distance between them, and G is the gravitational constant. In SI units, the units or force are kg* m/s^2, the units of mass are kg, and the units of distance are m. For this equation to have consistent units, the units of G must be which of the following?

Homework Equations

F=GM_1M_2/r^2

The Attempt at a Solution

i have no idea where to begin. it seems to me they should give me the dimensions of mass and force, but they dont.

 

[physicsface]

Plug in the units and solve for the gravitational constant.

 

[Redbelly98]

...it seems to me they should give me the dimensions of mass and force, but they dont.

Actually they do give that information:

In SI units, the units or force are kg*m/s^2, the units of mass are kg,...

 

[CocoonOHorror]

Actually they do give that information:

those are the dimensions?

 

[Redbelly98]

Yes.

 

[CocoonOHorror]

man, i reall don't understand the question then

 

[Redbelly98]

Plug in the units and solve for the gravitational constant.

Exactly. Plug in the units for F, M1, M2, and r in the equation,

F=G M_1 M_2 / r^2