1.A 1000 kg satellite travels with an orbital speed of 500 m/s around a planet at an orbital radius of 8000 km. What is the mass of the planet?

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1.A 1000 kg satellite travels with an orbital speed of 500 m/s around a planet at an orbital radius of 8000 km. What is the mass of the planet?
2. A 1.0 kg mass is attached to the end of a 1.00 m long string and swung in a horizontal circle. If the mass completes one cycle in 0.42 s the speed of the mass is?

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