Name: ______________________________________________________ Section: ____ Tuesday, September 8 Quiz 2A Your starship lands on mysterious planet Y. As chief scientist-engineer, you measure the acceleration of gravity on the surface of the planet and find it to be 1.0 m/s 2 . The radius of the planet is 3.2×10 7 m. There is no appreciable atmosphere. a. What is the mass of the planet, in kg? b. If the starship goes into a circular orbit 5,000 km above the surface of the planet, how many hours will it take the ship to complete one orbit? Name: ______________________________________________________ Section: ____ Tuesday, September 8 Quiz 2B Your starship lands on mysterious planet Z. The radius of the planet is 3.2×10 6 m; and there is no appreciable atmosphere. A small moon moves on a circular orbit with period 42 hours. The distance between the moon and the center of planet Z is 8.0×10 7 m a. What is the mass of the planet, in kg? b. What is the magnitude of the acceleration of gravity on the surface of the planet? Name: ______________________________________________________ Section: ____ Tuesday, September 8 Quiz 2C In a galaxy far, far away, Darth Vader has set the Death Star in a circular orbit 9.0 ×10 7 m above the surface of planet Endor, whose circumference at the equator is 2.0×10 8 m. The period of the orbit is 27 hours. a. What is the mass of Endor? b. What is the magnitude of the gravitational acceleration on the surface of Endor? Name: ______________________________________________________ Section: ____ Tuesday, September 8 Quiz 2D In a galaxy far, far away, Darth Vader sets his starfighter in a circular orbit 34,000 km above the surface of Tatooine. The magnitude of the gravitational acceleration g on the surface of Tatooine is identical to that on Earth, although Tatooine’s mass is 1.0×10 25 kg –a little larger than Earth’s. a. What is the radius of Tatooine? b. What is the period of Darth Vader’s starfighter? Paula Microsoft Word - Quiz 02