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Mechanical Properties Of Fluids

Question

In a sinusoidal wave, the time required for a particular point to move from maximum displacement to zero displacement is 0.170.The frequency of the wave will be

2.94Hz

0.73Hz

0.36Hz

1.47Hz

Solution

1.47Hz

Maximum displacement from mean occurs at $\frac{T}{4}$ .

For a motion in SHM particle taken $\frac{1}{4}$ th of periodic time to reach maximum displacement.

frequency n = $\frac{1}{T}$ = $\frac{1}{0.68}$ =1.47Hz