Q. If a compression coil spring of stiffness 10 Nm is cut into two equal parts and the used in parallel the equivalent spring stiffness will be :
Solution:
- When the spring is cut into two, the no.of coils get halved. therefore, stiffness of each coil get doubled.
- When these are connected in parallel, the equivalent spring stiffness = 2k=4k.
- Here equivalent stiffness = 4 x 10 Nm = 40 Nm.
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