Two satelities S1 and S2 revolve round a planet in coplanar circular orbits in the same sense. Their periods of revoluions are 1h and 8h respectively. The radius of the orbit of S1 is 10^4km. When S2 is closed to S1 FIND ;
(i) speed of S2 relative to S1 and
(ii) angular speed of S2 actually observed by an astronaut in S1 ?