18-50. The compound disk pulley consists of a hub andattached outer rim. If it has a mass of 3 kg and a radius ofgyration of ke = 45 mm, determine the speed of block Aafter A descends 0.2 m from rest. Blocks A and B each havea mass of 2 kg. Neglect the mass of the cords.100 mm30 mm

Given: The mass of the hub and rim combined is m=3 kg. The radius of gyration is kG=45 mm. The…

Answered: 18-50. The compound disk pulley…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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3. A yo-yo has a weight of 0.3 lb and a radius of gyration ko = 0.06 ft. If it is released from rest, determine how far it must descend in order to attain an angular velocity @ = 70 rad/s. neglect the mass of the string and assume that the string is wound around the central peg such that the mean radius at which it unravels is r = 0.02 ft.
2. The tapered cylindrical bar in Fig. 2 is subjected to opposing torques T on its free ends. For the tapered section only, the angle of twist 0 can be expressed as: 32 TI(d? + d,d2 + dž) Gd d? 37n (a) Derive an expression for the effective spring constant keff for the entire bar, treating each segment as a torsional spring in series. Fig. 2 (b) For the bar shown, let; I, = 12 = 12 in., 1= 24 in., d1= 0.25 in., d2= 1 in., T = 1000 lbf-in., and G = 13.5 x 103 kpsi. Calculate the angle twist 0 for the entire bar using the expression for kef determined in (a). Verify that this value is the sum the angles of twist for each individual %3D %3D segment.
SOLVE USING PRINCIPLE OF WORK AND ENERGY
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18-50. The compound disk pulley consists of a hub and attached outer rim. If it has a mass of 3 kg and a radius of gyration of ke = 45 mm, determine the speed of block A after A descends 0.2 m from rest. Blocks A and B each have a mass of 2 kg. Neglect the mass of the cords. 100 mm 30 mm