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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

π2

b

3π2

c

0

d

π

answer is A.

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Detailed Solution

Equation of the SHM x=Acosωt.

When x=0 for the first time, phase ωt=π2.

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