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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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This note was uploaded on 12/07/2011 for the course PHYS 220 taught by Professor Chang during the Fall '09 term at Purdue.
 Fall '09
 CHANG
 Inertia, Work

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