NCERT Question 5 - Chapter 13 Class 8 - Sound

A pendulum oscillates 40 times in 4 seconds. Find its time period and frequency.

Answer

Given

Number of oscillations = 40

Time taken=4 seconds

Now,

Frequency = Number of oscillations/ Total time

                 = 40/4

                 = 10 Hertz

Time period = 1/ Frequency

                   = 1/10

                   = 0.1 seconds