A satellite is spinning at 6.2 rev/s. The satellite consists of a main body in the shape of a solid sphere of radius 2.0 m and mass 10,000 kg and two antennas projecting out from the center of mass of the main body that can be approximated with rods of length 3.0 m each and mass 16 kg. The antennas lie in the plane of rotation. What is the angular momentum of the satellite about its center?

Explanation:

First convert angular speed from 6.2 rev/s to rad/s knowing that each revolution is 2π rad:

The we can calculate the moments of inertia of the satellite by summing up the 2 moments of inertia of the solid sphere and the 2 rods at their ends:

Then the angular momentum is the product of angular velocity and moment of inertia

the current is 0.6

voltage ÷ resistance = current

so 12 ÷ 20 = 0.6