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Question

A $$10$$ kg satellite completes one revolution around the earth at a height of $$100$$ km in $$108$$ minutes. The work done by the gravitational force of earth will be?


A
108×100×10J
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B
108×10100J
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C
0J
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D
100×10108J
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Solution

The correct option is C $$0$$J
Listing out the Formula
Work Done = Force x Displacement
Force = Mass x Acceleration
Considering the displacement of this Sattelite
One complete circle = Displacement = 0
∴ Work Done by Gravity is Zero

Physics

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