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Unformatted text preview: Thevalingam, Donald Homework 31 Due: May 24 2007, midnight Inst: Eslami 1 This print-out should have 15 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 1) 10 points Find the magnitude of the torque produced by a 4.9 N force applied to a door at a per- pendicular distance of 0.39 m from the hinge. Answer in units of N m. 002 (part 1 of 2) 10 points A simple pendulum consists of a 2.1 kg point mass hanging at the end of a 4.7 m long light string that is connected to a pivot point. The acceleration of gravity is 9 . 81 m / s 2 . a) Calculate the magnitude of the torque (due to the force of gravity) around this pivot point when the string makes a 2 . 4 angle with the vertical. Answer in units of N m. 003 (part 2 of 2) 10 points b) Repeat this calculation for an angle of 13 . 3 . Answer in units of N m. 004 (part 1 of 1) 10 points Given: A circular shaped object with an inner radius of 14 cm and an outer radius of 26 cm. There are three forces (acting perpendicular to the axis of rotation) whose magnitudes are 10 N, 26 N, and 14 N acting on the object, as...
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