Class 15 - 1 Friction, Curved Paths Physics 1301, Fall...

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Unformatted text preview: 1 Friction, Curved Paths Physics 1301, Fall 2011: Class 15 Wednesday, October 5, 2011 Technology in the Middle East, ME 1130 at 12:30 pm today 2 Objectives: Wednesday, September 28 Friction Forces for curved paths 3 Demonstrations 1g20.40 Cup and weights 1g20.45 Dropped slinky 1g20.80 Cart and elastic band 1g20.85 Acceleration and pendulum cart 1g20.90 Drop accelerometer Problem A steel block is at rest on a steel inclined plane. The angle of the plane above the horizontal is slowly increased until the block begins to slide. At what angle does this occur? 4 Problem A steel block is at rest on a steel inclined plane. The angle of the plane above the horizontal is slowly increased until the block begins to slide. At what angle does this occur? 5 N mg cos = F f mg sin = F f = s N = s mg cos s mg cos mg sin = tan = s = tan 1 s = tan 1 0.80 ( ) = 39 Drag Model for drag (air resistance) is that it depends on...
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This note was uploaded on 11/10/2011 for the course PHYS 1301W taught by Professor Marshak during the Fall '08 term at Minnesota.

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Class 15 - 1 Friction, Curved Paths Physics 1301, Fall...

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