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Unformatted text preview: Can choose a different coordinate system for each object. Identify forces and important relationships: Tension in the rope will be the same (assumes massless rope) Atwood Machine Accelerometer Used to measure acceleration Can be as simple as a rock and a string. Measure angle, measure acceleration. F y = T y mg = ma y F y = T y mg = ma y F x = T x = ma x Ears and Balance Hairs in your ear measure acceleration in a way similar to a rock on a string. NonInertial Reference Frames When one reference frame is accelerating, e.g. the plane, and another is not, e.g. the ground, observers in the different reference frame observe different phenomena different rules apply. We stick to inertial (non accelerating) reference frames because Newton's Laws work for all of them....
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 Fall '09
 CHANG
 Inertia, Work

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