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Unformatted text preview: Patel (pnp223) homework 10 Turner (92160) 1 This print-out should have 11 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 (part 1 of 2) 10.0 points A snowboarder of mass m is at rest on the top of a sand dune. The coefficients of static and kinetic friction are s and k , respectively. The acceleration of gravity is 9 . 8 m / s 2 . m s k What is the angle the incline must exceed so that the snowboarder starts sliding? 1. = arcsin s 2. = 1 arctan s 3. = arcsin k 4. = arctan k 5. = 1 arctan k 6. = arccos s 7. = arccos k 8. = arctan s 002 (part 2 of 2) 10.0 points What is the acceleration down the incline if exceeds the value found in the previous question? 1. a = g ( k sin - s cos ) 2. a = g ( s sin - cos ) 3. a = g k cos 4. a = g s cos 5. a = g (sin - s cos ) 6. a = g (sin - k cos ) 7. a = g s sin 8. a = g ( k sin - cos ) 9. a = g (...
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