Chapter 8. Coordinate Systems. (1) Conventional Coordinate Systems. Cartesian: Three axes perpendicular to each other. . Plane polar coordinates are a natural way to describe circular motion.
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Plane polar coordinates are a natural way to describe circular motion.
The resultant of these two forces can be expressed as a single force, FEG, effective gravity.
Since the centrifugal force is small compared to gravity, the direction of the effective gravity force is close to, but not exactly in the same direction as gravity.
We, air molecules, etc. experience this and call it the force of gravity, except it is really the result of true gravity and the Earth’s motion.
(as done in chapter 5) and substitute that in for density gives.