Question

Suppose that some astronauts are gently floating inside the International Space Station (ISS), not touching the walls of their cabin or anything else. The ISS is in "low Earth orbit" -- a circular orbit roughly 1/10 of an Earth-radius above the Earth's surface (but safely above the drag of the atmosphere). Which of the following statements are TRUE? Select ALL that apply: A. The Space Station is traveling at a constant speed as it orbits the Earth. B. The "local value" of gravitational acceleration at the astronauts' location is zero. C. While orbiting, the astronauts have zero mass. D. While orbiting, the astronauts have zero weight. E. There is a net force acting on each astronaut directed downward, toward the center of the Earth. F. The astronauts are in freefall.

          Suppose that some astronauts are gently floating inside the International Space Station (ISS), not touching the walls of their cabin or anything else. The ISS is in "low Earth orbit" -- a circular orbit roughly 1/10 of an Earth-radius above the Earth's surface (but safely above the drag of the atmosphere). Which of the following statements are TRUE? Select ALL that apply:
A. The Space Station is traveling at a constant speed as it orbits the Earth.
B. The "local value" of gravitational acceleration at the astronauts' location is zero.
C. While orbiting, the astronauts have zero mass.
D. While orbiting, the astronauts have zero weight.
E. There is a net force acting on each astronaut directed downward, toward the center of the Earth.
F. The astronauts are in freefall.

Added by Julio H.

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