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Question

Natural length of a spring is 60 cm, and its spring constant is 4000 N/m. A mass of 20 kg is hung from it. The extension produced (in cm) in the spring is, (Take g=9.8m/s2)

Moderate
Solution

If x is the extension produced in spring.

F=kxx=Fk=mgk=20×9.84000=4.9cm

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