Consider a simple harmonic motion of time period T. Calculate the time taken for the displacement to change the value from half the amplitude to the amplitude.
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Since, the motion is a simple Harmonic. Therefore, its equation will be given by the formula,
x = ASin(wt + Φ)
Now, for first travelling,
x = A/2
we will get,
Sin(ωt + Φ) = 1/2
Φ = 0, in initial phase.
∴ ωt = π/6
t₁ = π/6ω
For second Journey, from A/2 to A,
x = ASin(ωt + Φ)
Sin(ωt) = Sinπ/2
ωt = π/2
t₂ = π/2ω
Time taken from A/2 to A = π/2ω - π/6ω
= π/3ω
Now, ω = 2π/T
∴ Time taken = π/3(2π/T)
=T/6.
Hope it helps.
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