Evaluate
initial
displacement
0
.
1
mass
per
unit
length
of
string
0
.
05
gravitational
acceleration
1
.
5
balloon
volume
3
damping
constant
0
.
02
run
20
40
60
80
100
t
-
1
.
0
-
0
.
5
0
.
0
0
.
5
1
.
0
s
(
t
)
,
s
'
(
t
)
,
s
'
'
(
t
)
