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Question

The 105,000kg space shuttle is doing a training exercise in outer space.
How much energy would it take to bump up the space shuttle from an altitude of 500km to 1000km above the surface of the earth?
Assume the radius of the Earth is 6.37×106m and the mass of the Earth is 5.98×1024kg

A
2.07×1011J
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B
2.10×1013J
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C
4.15×1011J
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D
4.19×1013J
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E
2.09×1013J
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Solution

The correct option is A 2.07×1011J
Given : G=6.67×1011 Nm2/(kg)2 Me=5.98×1024 kg Re=6.37×106 m
Ms=105000 kg
Radius of initial orbit r1=(6.37+0.5)×106=6.87×106 m
Radius of final orbit r2=(6.37+1.0)×106=7.37×106 m

Energy required E=GMeMs2[1r11r2]

E=6.67×1011×5.98×1024×1050002[16.87×10617.37×106]=2.07×1011 J

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