Answer:
[tex] f2/f1 = \sqrt{2} [/tex]
Explanation:
From frequency of oscillation
[tex] f = 1/2pi *\sqrt{k/m} [/tex]
Initially with the suspended string, the above equation is correct for the relation, hence
[tex] f1 = 1/2pi *\sqrt{k/m} [/tex]
where k is force constant and m is the mass
When the spring is cut into half, by physics, the force constant will be doubled as they are inversely proportional
[tex] f2 = 1/2pi *\sqrt{2k/m} [/tex]
Employing f2/ f1, we have
[tex] f2/f1 = \sqrt{2} [/tex]