A satellite circles planet Roton every 2.8 h in an orbit having a radius of 1.2 × 107 m. If the radius of Roton is 5.0 × 106 m, what is the magnitude of the free-fall acceleration on the surface of Roton?
A. 31 m/s2
B. 27 m/s2
C. 34 m/s2
D. 40 m/s2
E. 19 m/s2
Answer: B
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