Question

A simple pendulum completes 20 vibrations in 3s. Find its frequency.

Answer 1

Answer:

Frequency = vibrations/time period

= 20/3

= 6.66 Hz

Answer 2

$\red{\mid{\underline{\overline{\textbf{Answer}}}\mid}}$

For a pendulum that is oscillating at a particular rate, we define it's frequency as the ratio of vibrations it produces in a particular time to time taken to produce them. It can be defined by the expression :

$n = \frac{v}{t}$

In this equation :-

• n = frequency
• v = total vibrations
• t = time.

$\red{\mid{\underline{\overline{\textbf{solving \: the \: question :-}}}\mid}}$

Now the frequency of pendulum will be :

$n = \frac{v}{t}$

After inputting the known values in equation we get :

$n = \frac{20}{3} = 6.66$

Therefore frequency of given pendulum is 6.66Hz.

______________________________________

$\red{\mid{\underline{\overline{\textbf{more \: about \: waves :-}}}\mid}}$

• In a transverse wave the particles oscillate In a direction which is perpendicular to direction of wave propagation.
• In transverse waves the wavelength is distance between two crests or troughs.
• In a longitudinal wave the particle oscillate Parrallel to direction of wave propagation.
• In longitudinal wave the wavelength is distance between two compressions or rarefactions.

______________________________________

BY SCIVIBHANSHU

THANK YOU

STAY CURIOUS