Answers
mg=kx
k=0.3*9.8/0.3 = 9.8 Nm
time period = 1/2pi sqrt(K/m)
=1/2pisqrt(9.8/0.3) =0.91s
.Spring force= gravitational force
kx=mg=> k=0.3*9.8/0.3=9.8 N/m
where x is the stretch=30cm=0.3m
m=0.3kg
w=sqrt(k/m)=(9.8/0.3)^(0.5)=5.71 rad
Time period T=2*pi/w=2*pi/5.71=1.1 s
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