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Unformatted text preview: tokarski (at23678) Static equlibrium Morozova (11104) 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 10.0 points A wheel of radius R and negligible mass is mounted on a horizontal frictionless axle so that the wheel is in a vertical plane. Three small objects having masses m , M , and 2 M , respectively, are mounted on the rim of the wheel, as shown. 60 R M 2 M m If the system is in static equilibrium, what is the value of m in terms of M ? 1. m = 3 M 2 2. m = M 2 3. m = M 4. m = 2 M 5. m = 5 M 2 002 (part 1 of 3) 10.0 points A crane of mass 410 kg supports a load of 70 kg. The cranes boom is 8 m long and the angle it makes with the horizontal is 57 . The distance between the front and rear wheels is 4 m. The acceleration of gravity is 9 . 8 m / s 2 . 410 kg 8 m 5 7 N f 4 m N r 70 kg Assume: The center-of-mass of the crane is half-way between the wheels (in the middle of the cranes body). Call the forces from the ground N r at the rear wheels and N f at the front wheels....
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- Spring '08