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Question
Physics
A point mass oscillates along the x-axis according to the law x = x0 cos (ω t − π/4). If the acceleration of the particle is written as a = A cos(ω t + δ) then
Q. A point mass oscillates along the
x
−
a
x
i
s
according to the law
x
=
x
0
cos
(
ω
t
−
π
/4
)
. If the acceleration of the particle is written as
a
=
A
cos
(
ω
t
+
δ
)
then
3147
214
AIEEE
AIEEE 2007
Oscillations
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A
A
=
x
0
,
δ
=
−
π
/4
25%
B
A
=
x
0
ω
2
,
δ
=
−
π
/4
11%
C
A
=
x
0
ω
2
,
δ
=
−
π
/4
15%
D
A
=
x
0
ω
2
,
δ
=
3
π
/4
49%
Solution:
v
=
−
x
0
ω
s
in
(
ω
t
−
π
/4
)
a
=
−
x
0
ω
2
cos
(
ω
t
+
π
−
4
π
)
a
=
A
cos
(
ω
t
+
δ
)
A
=
x
0
ω
2
;
δ
=
4
3
π