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Unformatted text preview: markowitz (am45362) – HW08 – distler – (56295) 1 This printout should have 21 questions. Multiplechoice questions may continue on the next column or page – find all choices before answering. 001 10.0 points A 6 m long, uniform ladder leans against a frictionless wall and makes an angle of 64 . 5 ◦ with the floor. The ladder has a mass 29 . 2 kg. A 75 . 92 kg man climbs 82% of the way to the top of the ladder when it slips and falls to the floor. What is the coefficient of static friction be tween the ladder and the floor? 002 10.0 points Two masses of 25 kg and 16 kg are suspended by a pulley that has a radius of 14 cm and a mass of 8 kg. The cord has a negligible mass and causes the pulley to rotate without slipping. The pulley rotates without friction. The masses start from rest 1 . 3 m apart. 1 . 3 m 14 cm 8 kg ω 25 kg 16 kg Determine the speeds of the two masses as they pass each other. Treat the pulley as a uniform disk. The acceleration of gravity is 9 . 8 m / s 2 . Answer in units of m / s 003 10.0 points A rod of mass m and length L is hinged with a frictionless hinge at one end. The moment of inertia about the center of mass is 1 12 mL 2 . Attached to the end of the rod opposite to the hinge there is a mass of magnitude 2 m . The rod is released from rest in the horizontal position. L m 2 m What is the speed of the mass 2 m when the rod passes through the vertical position? Consider the mass at the end of the rod to be a point particle. 1. bardbl vectorv 2 m bardbl = radicalbig g L 2. bardbl vectorv 2 m bardbl = radicalbigg 7 g L 15 3. bardbl vectorv 2 m bardbl = radicalbigg 5 g L 2 4. bardbl vectorv 2 m bardbl = radicalbigg 2 g L 3 5. bardbl vectorv 2 m bardbl = radicalbig 2 g L 6. bardbl vectorv 2 m bardbl = radicalbigg 15 g L 7 7. bardbl vectorv 2 m bardbl = radicalbigg 2 g L 5 8. bardbl vectorv 2 m bardbl = radicalbigg g L 2 9. bardbl vectorv 2 m bardbl = radicalbigg g L 10. bardbl vectorv 2 m bardbl = radicalbigg 3 g L 2 004 10.0 points A circularshaped object of mass 6 kg has an inner radius of 9 cm and an outer radius of 29 cm. Three forces (acting perpendicular29 cm....
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 Spring '08
 Kaplunovsky
 Physics, Friction, Mass, Rotation, kg

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