A Satellite Is in a Stable Orbit at an Elevation

A satellite is in a stable orbit at an elevation above the surface of the Earth equal to the radius of the Earth.An asteroid collides with the satellite.Both objects stop moving and fall straight down.How fast are the satellite and asteroid moving when they hit the surface of the Earth? In the answers,r = the radius of the Earth and m = the mass of the Earth.Ignore air resistance.

A)
B)
C)
D) None are correct.

Correct Answer:

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