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Unformatted text preview: Thevalingam, Donald Homework 32 Due: May 24 2007, midnight Inst: Eslami 1 This print-out should have 21 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. The due time is Central time. 001 (part 1 of 3) 10 points A bicycle wheel of radius 0 . 32 m rolls down a hill without slipping. Its linear velocity increases constantly from 0 to 5 m / s in 2 . 5 s. What is its angular acceleration? Answer in units of rad / s 2 . 002 (part 2 of 3) 10 points Through what angle does the wheel turn in the 2 . 5 s? Answer in units of rad. 003 (part 3 of 3) 10 points How many revolutions does it make? Answer in units of rev. 004 (part 1 of 1) 10 points A coin with a diameter of 3 . 39 cm is dropped onto a horizontal surface. The coin starts out with an initial angular speed of 8 . 66 rad / s and rolls in a straight line without slipping. If the rotation slows with an angular deceleration of magnitude 0 . 763 rad / s 2 , how far does the coin roll before coming to rest? Answer in units of m. 005 (part 1 of 3) 10 points A 4 . 17 kg hollow cylinder with inner radius . 12 m and outer radius 0 . 52 m is pulled by a horizontal string with a force of 33 . 7 N, as shown in the figure. 33 . 7 N 4 . 17 kg . 12 m . 52 m The frictional force exerted on the wheel by the floor 1. is to the left. 2. is to the right. 3. is zero. 006 (part 2 of 3) 10 points What must be the magnitude of the force of friction if the cylinder is to roll without slipping? 007 (part 3 of 3) 10 points What is the acceleration of the cylinders cen- ter of mass? Answer in units of m / s 2 ....
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