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The Earth exerts the necessary centripetal force on an orbiting satellite to kee

ID: 2144434 • Letter: T

Question

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?

The centripetal force has magnitude mv2/r.

The satellite is in equilibrium.

The centripetal force is always perpendicular to the velocity.

The centripetal force is canceled by the reaction force.

The acceleration of the satellite is zero m/s2.

                            a.           

The centripetal force has magnitude mv2/r.

                            b.           

The satellite is in equilibrium.

                            c.           

The centripetal force is always perpendicular to the velocity.

                            d.           

The centripetal force is canceled by the reaction force.

                            e.           

The acceleration of the satellite is zero m/s2.

Explanation / Answer

(e) The centripetal force is always perpendicular to the velocity.

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