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Unformatted text preview: Morby, Grant Homework 26 Due: Apr 5 2006, noon Inst: Drummond 1 This print-out should have 12 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 Given: g = 9 . 8 m / s 2 . A cylindrical stone column of diameter 2 R = 1 . 26 m and height H = 2 . 53 m is trans- ported in standing position by a dolly. a side view When the dolly accelerates or decelerates slowly enough, the column stands upright, but when the dollys acceleration magnitude exceed a critical value a c , the column top- ples over. (For a > + a c the column topples backward; for a <- a c the column toppes forward.) Calculate the magnitude of the critical ac- celeration a c of the dolly. Answer in units of m / s 2 . 002 (part 1 of 1) 10 points Two objects, of masses 21 kg and 28 kg, are hung from the ends of a stick that is 70 cm long and has marks every 10 cm, as shown. 21 kg 28 kg A B C D E F G 10 20 30 40 50 60 If the mass of the stick is negligible, at which of the points indicated should a cord be attached if the stick is to remain horizontal when suspended from the cord?...
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