Physics 15200- HW20

Physics 15200- HW20 - lai (yl8859) HW20 Ross (15200) 1 This...

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Unformatted text preview: lai (yl8859) HW20 Ross (15200) 1 This print-out should have 7 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 10.0 points A distant star has a single planet circling it in a circular orbit of radius 7 . 11 10 11 m. The period of the planets motion about the star is 703 days. What is the mass of the star? The value of the universal gravitational constant is 6 . 67259 10- 11 N m 2 / kg 2 . Answer in units of kg. 002 10.0 points An object is dropped from rest from a height 6 . 9 10 6 m above the surface of the earth. If there is no air resistance, what is its speed when it strikes the earth? The acceleration of gravity is 9 . 81 m / s 2 and the radius of the Earth is 6 . 37 10 6 m. Answer in units of km / s. 003 (part 1 of 2) 10.0 points When it orbited the Moon, the Apollo 11 spacecrafts mass was 15400 kg, its period was 109 min, and its mean distance from the Moons center was 1 . 74578...
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This note was uploaded on 02/24/2011 for the course PHYS 152 taught by Professor Button during the Winter '08 term at IUPUI.

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