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
-
5Hz
- 6Hz
- 5.2Hz
- 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
There is an explanation video available .