Question

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

Answer 1

Answer:

time period -1/10

frequency -10harz

Answer 2

Given that,

No of oscillations, N = 40

Time, t = 4 seconds

To find,

Its time period and frequency

Solution,

Number of oscillations per unit time is called frequency of an object. It can be given by :

$f=\dfrac{N}{t}\\\\f=\dfrac{40}{4}\\\\f=10\ Hz$

The reciprocal of frequency is called time period. So,

$T=\dfrac{1}{f}\\\\T=\dfrac{1}{10}\\\\T=0.1\ s$

Hence, time period is 0.1 seconds and frequency is 10 Hz.