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Classical Mechanics

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Floating in the ISS

CLMECH-K2UILY

Videos of astronaut's in the International Space Station (ISS) show them floating around apparently weightless. Why do they not seem to be feeling the Earth's gravity?

A

They are so far away from the Earth that the gravity is negligible.

B

They space station's engine's are pushing them forward, keeping the Earth's gravity from affecting them.

C

The space station is in free-fall, resulting in apparent weightlessness.

D

When things are launched into space by rockets, they lose all of their gravitational potential energy, and are thereafter weightless.