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Physics
Physics
Problem
Two identical particles move along the same straight line according to
x
1
=
A
cos
ω
t
\displaystyle x_1 = A\cos \omega t
x
1
=
A
cos
ω
t
and
x
2
=
A
cos
(
ω
t
+
π
3
)
\displaystyle x_2 = A\cos\bigl(\omega t + \dfrac{\pi}{3}\bigr)
x
2
=
A
cos
(
ω
t
+
3
π
)
. If
T
T
T
is the time period, the time after
t
=
0
t=0
t
=
0
when they first have the same displacement again is a)
T
6
\dfrac{T}{6}
6
T
b)
7
T
12
\dfrac{7T}{12}
12
7
T
c)
5
T
12
\dfrac{5T}{12}
12
5
T
d)
T
3
\dfrac{T}{3}
3
T
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