Tangential velocity in circular motion is defined as v = r?, where r is the radius and ? is the angular velocity. If you have a rotating rod with an angular velocity of 20,000 radians per second (10,000 revolutions per second) and a radius of 15,000 meters, the tangential velocity of an item at the tip of the rod will be 300,000,000 m/s, breaking the speed of light.

Einstein BTFO