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Unformatted text preview: markowitz (am45362) HW08 distler (56295) 1 This print-out should have 21 questions. Multiple-choice 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 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 circular-shaped 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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