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A vibrator causes water ripples to travel across the surface of a tank. The wave...


Question

A vibrator causes water ripples to travel across the surface of a tank. The wave travels 50cm in 2s and the distance between successive crests is 5cm. Calculate the frequency of the vibrator

Options

A) 5Hz

B) 6Hz

C) 5.2Hz

D) 25Hz

The correct answer is A.

Explanation:

\(V = \frac{Distance}{time}\)

= \(\frac{50cm}{2s}\)

= 25 cms\(^{-1}\).

\(V = f \lambda\)

\(f = \frac{V}{\lambda}\)

\(f = \frac{25}{5}\)

= 5 Hz


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