posted by Boberto .
A new geosynchronous satellite needs an orbit of 35.7 km . The mass of the Earth is 5.97x 10^24 Kg and the radius of Earth 6.4 x 10^3 km. The mass of the satellite is 200 Kg. What velocity will it need to achieve that orbit?
A string 1.0 m long breaks when its tension is 100 N. What is the greatest speed at which it can be used to whirl a 1.0 kg stone? (Neglect the gravitational pull of the earth on the stone.)