Mathematics · Spring Stiffness
A closed coil helical spring of stiffness 30 N/mm is arranged in series with another such spring of stiffness 60 N/mm. The stiffness of the composite unit is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 190 N/mm
- 245 N/mm
- 330 N/mm
- 420 N/mm✓
Correct answer
20 N/mm
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