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Why does an orbiting satellite's speed remain constant?


Why does an orbiting satellite's speed remain constant?
A) The satellite is programmed to remain at a constant speed.
B) The satellite will constantly change direction and speed as it orbits.
C) The gravity of the earth is a parallel force which only affects direction, and not speed.
D) The gravity of the earth is a perpendicular force which, affects direction and not speed.

Respuesta :

dlimasinstructions

The gravity on earth is a perpendicular force which does not affect speed. Also, once the satellite is out in space it is not longer affected by the earth´s gravity and its speed remains constant.  

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