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Unformatted text preview: negligible mass so that their centertocenter distance D is noticeably greater than twice the physical radius R of each disk, as shown. Again, find the moment of inertia of these two disks about their point of contact. Give your answer in terms of the mass m and radius R of each disk and the distance D. (c) Show that your expression from part (b) properly reduces to the expression from part (a) when D = 2R. 2. A cylindrical section of a tree trunk 50 cm in diameter and 75 cm long is seen rolling at a speed of 12 m/s down a sloping road below a sawmill. (Wood has a density of 750 kg/m 3 .) Assuming that the road has an incline of 5% (meaning that if you travel 100 m along the road, you go up or down by 5 m), at least how far up the road is the sawmill? Describe any assumptions or approximations that you make. Please include a carefullylabeled diagram to illustrate your solution. D R R m m...
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 Fall '07
 LECLAIR,A
 mechanics, Work

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