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Unformatted text preview: jang (sj22738) – hw4 – choi – (11155) 1 This print-out should have 13 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 small block of mass 32 g is released from rest at the top of a curved frictionless wedge of mass 243 g which sits on a frictionless horizontal surface as shown. The acceleration due to gravity is 9 . 81 m / s 2 . Right is the positive direction. 32 g 243 g h When the block leaves the wedge, its veloc- ity is 3 . 85 m / s to the right. 32 g 3 . 85 m / s 243 g v b What is the velocity v b of the wedge after the block reaches the horizontal surface? Answer in units of m / s. 002 (part 2 of 2) 10.0 points What is the height h of the wedge? Answer in units of m. 003 10.0 points A bicycle wheel has a diameter of 79 . 6 cm and a mass of 1 . 55 kg. The bicycle is placed on a stationary stand and a resistive force of 182 N is applied tangent to the rim of the tire. Assume that the wheel is a hoop with all of the mass concentrated on the outside radius. In order to give the wheel an acceleration of 5 . 4 rad / s 2 , what force must be applied by a chain passing over a 8 . 9 cm diameter...
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This note was uploaded on 04/23/2011 for the course ECON 101 taught by Professor No during the Spring '11 term at American Baptist.
- Spring '11