Answer:
Step-by-step explanation:
If you are searching for the time period,
By the proof in the attachment you can derive the equation,
T =2π√(m/k)
Where
T = time period,
m = mass hung
k = spring constant
So you get T as, T = 0.44 s
If you are searching for frequency f,
f = 1/T = 2.25 Hz