5. Two helical coil springs are made from a steel bar radius of 20 mm. One spring has an outer and inner diameter of 10 cm and 6 cm respectively while the other one has a coil diameter of 12 cm. The springs have 20 turns each. What is the equivalent stiffness of the assembly if: a. the spring with the smaller coil diameter is placed inside the spring with the larger coil diameter; b. the spring with the smaller coil diameter is placed on top of the spring with the larger coil diameter. c. the spring rate equivalent at (a) is parallel with the spring rate equivalent at (b) d. the spring rate equivalent at (a) is in series with the spring rate equivalent at (b)

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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The subject is Vibration Engineering

5. Two helical coil springs are made from a steel bar radius of 20 mm. One spring has an outer
and inner diameter of 10 cm and 6 cm respectively while the other one has a coil diameter of 12
cm. The springs have 20 turns each. What is the equivalent stiffness of the assembly if:
a. the spring with the smaller coil diameter is placed inside the spring with the larger coil diameter;
b. the spring with the smaller coil diameter is placed on top of the spring with the larger coil
diameter.
c. the spring rate equivalent at (a) is parallel with the spring rate equivalent at (b)
d. the spring rate equivalent at (a) is in series with the spring rate equivalent at (b)
e. the derived spring rate equivalent equation at (c)
f. the derived spring rate equivalent equation at (d)
Transcribed Image Text:5. Two helical coil springs are made from a steel bar radius of 20 mm. One spring has an outer and inner diameter of 10 cm and 6 cm respectively while the other one has a coil diameter of 12 cm. The springs have 20 turns each. What is the equivalent stiffness of the assembly if: a. the spring with the smaller coil diameter is placed inside the spring with the larger coil diameter; b. the spring with the smaller coil diameter is placed on top of the spring with the larger coil diameter. c. the spring rate equivalent at (a) is parallel with the spring rate equivalent at (b) d. the spring rate equivalent at (a) is in series with the spring rate equivalent at (b) e. the derived spring rate equivalent equation at (c) f. the derived spring rate equivalent equation at (d)
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