A satellite is in a circular orbit about the Earth at an altitude ...

[SO00]

A satellite is in a circular orbit about the Earth at an altitude at which air resistance is negligible. Which of the following statements is true?
 a. There is only one force acting on the satellite. b. There are two forces acting on the satellite, and their resultant is zero.
  c. There are two forces acting on the satellite, and their resultant is not zero.
  d. There are three forces acting on the satellite. e. None of the preceding statements are correct.

Question 2

A 50-kg satellite circles planet Cruton every 5.6 h in an orbit with a radius of 12  106 m. What is the magnitude of the gravitational force on the satellite by planet Cruton?
 a. 63 N
  b. 58 N
  c. 68 N
  d. 73 N
  e. 50 N

[stallen]

Answer to Question 1

A

Answer to Question 2

B