Please check my recent question... lots of points. If you know it just copy and paste on all the times I asked it!

The 20@kg wheel has a radius of gyration about its center g of kg = 300 mm. when it is subjected to a couple moment of m = 50 n # m, it rolls without slipping. determine the angular velocity of the wheel after its mass center g has traveled through a distance of sg = 20 m, starting from rest.

Determine el momento angular de un rueda de 3000g moviendose a 10m/s con un radio de giro de 400cm

What is the orbital period of a spacecraft in a low orbit near the surface of mars? the radius of mars is 3.4×106m.