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# Many people assume air resistance acting on a moving object will always make the object show down. It can, however actually be responsible for making the object speed up. Consider a $$100\ kg$$ Earth satellite in a circular orbit at an altitude of $$200\ km$$. A small force of air resistance makes the satellite drop into a circular orbit with ab altitude of $$100\ km$$.What force makes the satellite's speed increase?

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Q1
Many people assume air resistance acting on a moving object will always make the object show down. It can, however actually be responsible for making the object speed up. Consider a $$100\ kg$$ Earth satellite in a circular orbit at an altitude of $$200\ km$$. A small force of air resistance makes the satellite drop into a circular orbit with ab altitude of $$100\ km$$.
What force makes the satellite's speed increase?
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Q2
Many people assume air resistance acting on a moving object will always make the object show down. It can, however actually be responsible for making the object speed up. Consider a $$100\ kg$$ Earth satellite in a circular orbit at an altitude of $$200\ km$$. A small force of air resistance makes the satellite drop into a circular orbit with ab altitude of $$100\ km$$.
Calculate the initial energy of the satellite Earth system.
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Q3
Many people assume air resistance acting on a moving object will always make the object show down. It can, however actually be responsible for making the object speed up. Consider a $$100\ kg$$ Earth satellite in a circular orbit at an altitude of $$200\ km$$. A small force of air resistance makes the satellite drop into a circular orbit with ab altitude of $$100\ km$$.
Calculate its final speed in this process.
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Q4
A $$1000-kg$$ satellite orbits the Earth at a constant altitude of $$100\ km$$.
How much energy must be added to the system to move the satellite into a circular orbit with altitude $$200\ km$$?
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Q5
A satellite in Earth orbit has a mass of $$100\ kg$$ and is at an altitude of $$2.00 \times 10^6\ m$$. What force, if any, does the satellite exert on the Earth?
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