sanafarghal
07.07.2021 •
Physics
During the period of inflation, the universe may have briefly expanded at 1030 ( a million trillion trillion) or more times the speed of light. Why did this ultra rapid expansion not violate Einstein's special relativity, which says that neither matter nor communication can move faster than the speed of light.
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Ответ:
(C) because the elevator is not accelerating
Note F = M a = M g (the resultant force on the elevator is due to gravity)
or Fup = Fc the force exerted on the elevator by the cable
and Fdown = Fe the force exerted on the elevator by gravity
F = M a = Fup - Fdown = zero resultant force on elevator