A satellite orbits the earth a distance of 1.50 107 m above the planet's surface and takes 8.65 hours for each revolution about the earth. The earth's radius is 6.38 106 m. The acceleration of this satellite is closest to
A) 0.870 m/s2.
B) 0.0690 m/s2.
C) 9.80 m/s2.
D) 2.72 m/s2.
E) 1.91 m/s2.
Question 2
The moons of Mars, Phobos (Fear) and Deimos (Terror), are very close to the planet compared to Earth's Moon. Their orbital radii are 9,378 km and 23,459 km respectively.
What is the ratio of the orbital speed of Phobos to that of Deimos?
A) 1.582 B) 0.2528 C) 3.956 D) 2.858 E) 0.3998
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