Is the Moment of Inertia Calculation Correct for a Solid Sphere in Space?

[jumbogala]

Homework Statement

A solid sphere of mass 2 kg and 5 m radius is in space. Find its moment of inertia.

Homework Equations

²
moment of inertia of a solid sphere about its diameter: \frac{2}{5}MR², where M is the mass of the sphere and R is its radius.

The Attempt at a Solution

I = mr^2 = (2 kg)(25 m^2) = 50 kgm^2

Is that right, or am I totally out to lunch? Seems too easy.

 

[rock.freak667]

Yes that looks correct to me.