The Earth Exerts the Necessary Centripetal Force on an Orbiting

question 40

Multiple Choice

The Earth exerts the necessary centripetal force on an orbiting satellite to keep it moving in a circle at constant speed. Which one of the following statements best explains why the speed of the satellite does not change although there is a net force exerted on it?

• A)The satellite is in equilibrium.
• B)The acceleration of the satellite is zero m/s².
• C)The centripetal force has magnitude mv²/r.
• D)The centripetal force is canceled by the reaction force.
• E)The centripetal force is always perpendicular to the velocity.

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