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Physics
Physics
Problem
18. The equation of motion of a simple harmonic oscillator is
d
2
x
/
d
t
2
=
−
9
x
d^{2} x / d t^{2}=-9 x
d
2
x
/
d
t
2
=
−
9
x
, where
x
x
x
is displacement and
t
t
t
is time. The period of oscillation is (A)
6
π
6 \pi
6
π
(B)
9
/
2
π
9 / 2 \pi
9/2
π
(C)
3
/
2
π
3 / 2 \pi
3/2
π
(D)
2
π
/
3
2 \pi / 3
2
π
/3
(E)
2
π
/
9
2 \pi / 9
2
π
/9
(A)
6
π
6 \pi
6
π
(B)
9
/
2
π
9 / 2 \pi
9/2
π
(C)
3
/
2
π
3 / 2 \pi
3/2
π
(D)
2
π
/
3
2 \pi / 3
2
π
/3
(E)
2
π
/
9
2 \pi / 9
2
π
/9
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