Concept explainers
In circular orbit, the gravitational force on a satellite is
(a) constant in magnitude.
(b) at right angles to satellite motion.
(c) Both of these.
(d) Neither of these.
The correct option for the statement "In circular orbit, the gravitational force on a satellite is".
Answer to Problem 7RAT
The correct option for the statement "In circular orbit, the gravitational force on a satellite is" is option (c).
Explanation of Solution
The gravitational force depends on the masses of interacting objects and the distance separating them. Since the satellite follows a circular path around the Earth, then the distance separating the Earth and the satellite is always same. Therefore, the gravitational force acting on it is constant.
The centripetal force required for the circular motion of the satellite in orbit is given by the gravitational force. Thus, the gravitational force is directed towards the center. This gravitational force is at right angles to the direction of motion of the satellite.
Conclusion:
Therefore, the correct option for the statement "In circular orbit, the gravitational force on a satellite is" is option (c).
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