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Q.

In a horizontal spring-mass system, mass m is released after being displaced towards right by some distance at t = 0 on a frictionless surface. The phase angle of the motion in radian when it is first time passing through the equilibrium position is equal to

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a

$\frac{π}{2}$

b

$π$

c

$\frac{3 π}{2}$

d

0

answer is A.

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Detailed Solution

Equation of the SHM $x = A \cos (ω t)$ .

When $x = 0$ for the first time, phase $ω t = \frac{π}{2}$ .

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