1.

Aspringofforce constant k is cut into three equal parts, which are joined in parallel to each other. The force constant of the combination will be :

Answer»

<P>k
3 k
9 k
k/3.

Solution :Since spring is cut into 3 EQUAL parts.
`:.` Spring constant of each part becomes 3k.
`:.` In PARALLEL `k_(p)=k_(1)+k_(2)+k_(3)=3k+3k+3k=9k`.
Hence correct CHOICE is ( C ).


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