Question

A planet orbiting the Sun has speed v = (GM/d). Escape speed from the Sun is v = v(2GM/d), where G is the gravitational constant, M is Sun's mass, and d is the distance from the Sun. Noting that this tells us that escape speed is 2 times orbital speed, which planet would fly out of the solar system by a 1.5 increase in orbital speed?
A) Mercury.
B) Venus.
C) Earth.
D) all of the above
E) none of the above

Answer

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