Two solid cylinderical disks have equal radii. The first disk is spinning clockwise at and the second disk is spinning counterclockwise at . The second disk has a mass three times larger than the first. If both spinning disks are combined to form one disk, they end up rotating at the same angular velocity and same direction. Find this angular velocity after combination.

A piece of space debris is travelling in an elliptical orbit around a planet. At its closest point to the planet, the debris is travelling at . When the debris is from the planet, it travels at . How close does the debris get to the planet in its orbit?