18-51. The uniform garage door has a mass of 150 kg andis guided along smooth tracks at its ends. Lifting is doneusing the two springs, each of which is attached to theanchor bracket at A and to the counterbalance shaft at Band C. As the door is raised, the springs begin to unwindfrom the shaft, thereby assisting the lift. If each springprovides a torsional moment of M = (0.70) N·m, where 0 isin radians, determine the angle 0, at which both the left-wound and right-wound spring should be attached so thatthe door is completely balanced by the springs, i.e., whenthe door is in the vertical position and is given a slight forceupward, the springs will lift the door along the side tracks tothe horizontal plane with no final angular velocity. Note:The elastic potential energy of a torsional spring isVe =k0?, where M = k0 and in this case k = 0.7 N • m/rad.AВ3 m4 mProb. 18–51

Draw the initial and final position of the doors,

18–51. The uniform garage door has a mass of 150 kg and s guided along smooth tracks at its ends. Lifting is done using the two springs, each of which is attached to the anchor bracket at A and to the counterbalance shaft at B and C. As the door is raised, the springs begin to unwind rom the shaft, thereby assisting the lift. If each spring provides a torsional moment of M=(0.70) N • m, where 0 is n radians, determine the angle 0o at which both the left- wound and right- wound spring should be attached so that

18–51. The uniform garage door has a mass of 150 kg and s guided along smooth tracks at its ends. Lifting is done using the two springs, each of which is attached to the anchor bracket at A and to the counterbalance shaft at B and C. As the door is raised, the springs begin to unwind rom the shaft, thereby assisting the lift. If each spring provides a torsional moment of M=(0.70) N • m, where 0 is n radians, determine the angle 0o at which both the left- wound and right- wound spring should be attached so that

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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