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Why doesn't the force of gravity change the speed of a satellite in circular orbit?

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For a force\textbf{force} to change the body's speed it need to acts in a same direction\textbf{same direction} as the body's speed\textbf{speed}. Gravitational force is constantly acting on a satellite, but only enough to change the direction\textbf{direction} of its speed. It will act with exactly enough force to change the satellite direction so it would follow the curvature of the Earth\textbf{follow the curvature of the Earth}.

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