1. In a compound helical spring, the inner spring is arranged within and concentric with the outer one, but is 7 mm shorter in length. The outer spring has 12 coils of mean diameter 30 mm and the wire diameter is 3-5 mm. (i) Find the stiffness of the inner spring if an axial load of 150 N causes the outer spring to compress by 20 mm. (ii) If the radial clearance between the springs is 1-5 mm, find the wire diameter of the inner spring, if it has 10 coils. Take: C = 77000 N/mm?.

1. In a compound helical spring, the inner spring is arranged within and concentric with the outer one, but is 7 mm shorter in length. The outer spring has 12 coils of mean diameter 30 mm and the wire diameter is 3-5 mm. (i) Find the stiffness of the inner spring if an axial load of 150 N causes the outer spring to compress by 20 mm. (ii) If the radial clearance between the springs is 1-5 mm, find the wire diameter of the inner spring, if it has 10 coils. Take: C = 77000 N/mm?.

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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