1.

One fourth length of a spring of force constant k is cut away. The force constant of the remaining spring will be what ?

Answer»

`(3)/(4)k`
`(4)/(3)k`
`k`
`4K`

Solution :USING `k propto (1)/(l)`
Here, one FOURTH length is cut, so the length of remaining PART is `(3)/(4)l`
`therefore (k_2)/(k_1)= (l_1)/(l_2)= (l)/((3)/(4)l)= (4)/(3)`
`therefore k_(2)= (4)/(3)k`.


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