What is the gravitational force on a 20-kg satellite circling the Earth (radius = 6.4 × 106 m, mass = 6.0 × 1024 kg) with a period of 5.0 h?
A. 88 N
B. 55 N
C. 36 N
D. 98 N
E. 18 N
Answer: C
Physics & Space Science
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