Concept explainers
(a)
The initial speed of the satellite.
(a)

Answer to Problem 40AP
The initial speed of the satellite is
Explanation of Solution
The mass of the satellite is
Formula to calculate the initial speed of the satellite is,
Here,
Substitute
Conclusion:
Therefore, the initial speed of the satellite is
(b)
The final speed of the satellite.
(b)

Answer to Problem 40AP
The final speed of the satellite is
Explanation of Solution
Formula to calculate the final speed of the satellite is,
Here,
Substitute
Conclusion:
Therefore, the final speed of the satellite is
(c)
The initial energy of the satellite-Earth system.
(c)

Answer to Problem 40AP
The initial energy of the satellite-Earth system is
Explanation of Solution
Formula to calculate the initial energy of the satellite-Earth system is,
Here,
Substitute
Conclusion:
Therefore, the initial energy of the satellite-Earth system is
(d)
The final energy of the satellite-Earth system.
(d)

Answer to Problem 40AP
The final energy of the satellite-Earth system is
Explanation of Solution
Formula to calculate the final energy of the satellite-Earth system is,
Substitute
Conclusion:
Therefore, the final energy of the satellite-Earth system is
(e)
The mechanical energy of the system has decreased and estimates the amount of decrease mechanical energy of the system.
(e)

Answer to Problem 40AP
The amount of decrease mechanical energy of the system is
Explanation of Solution
Formula to calculate the mechanical energy of the system is,
Substitute
Conclusion:
Therefore, the amount of decrease mechanical energy of the system is
(f)
What force makes the satellite’s speed increases.
(f)

Answer to Problem 40AP
The component of the gravitational force pulls forward on the satellite and increases the speed of satellite.
Explanation of Solution
The only forces act on the satellite is the backward force of air resistance comparatively very small in magnitude to the force of gravity. Because the spiral path of the satellite is not perpendicular to the gravitational force, one component of the gravitational force pulls forward on the satellite to do positive work and makes speed increases.
Conclusion:
Therefore, component of the gravitational force pulls forward on the satellite and increases the speed of satellite.
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Chapter 13 Solutions
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