From Lecture 5 of 8.01 Classical Mechanics, Fall 1999, the professor talks about perceived gravity at about 24:50. He says that it is always in the opposite direction of the pull. But isn't gravity always downwards?
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Downwards? The direction of the gravity is to de Center of Mass|dw:1351866645910:dw|
Is in direction opposite to the pull because de vertical component of the pull is upright, perpendicular to Earth surface
But wouldn't gravity always come in the same direction if you're spinning? |dw:1351901532768:dw|
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The centripetal force is due to rotation, but gravity always points to the center of mass. On Earth, the composition of all forces due to rotation compounds the Coriolis force. But this is very small compared with force of gravity.
Moreover, the directions you painted indicate no force. I don't know what they are