8. Centripetal Forces & Gravitation
Satellite Motion: Speed & Period
Multiple Choice
Multiple ChoiceA distant planet orbits a star 3 times the mass of our Sun. This planet of mass 8 × 1026 kg feels a gravitational force of 2 × 1026 N. What is this planet's orbital speed and how long does it take to orbit once?
A
1 × 105m/s; 2.5 × 106s
B
1.29 × 105m/s; 2.5 × 106s
C
1 × 105m/s; 1.94 × 106s
D
1.29 × 105m/s; 1.94 × 106s
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