Question

A pendulum oscillates 40 times
is 4 secounds find its time
period and frequency.

Answer 1

Answer:

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 :

\begin{gathered}f=\dfrac{N}{t}\\\\f=\dfrac{40}{4}\\\\f=10\ Hz\end{gathered}

f=

t

N

f=

4

40

f=10 Hz

The reciprocal of frequency is called time period. So,

\begin{gathered}T=\dfrac{1}{f}\\\\T=\dfrac{1}{10}\\\\T=0.1\ s\end{gathered}

T=

f

1

T=

10

1

T=0.1 s

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

Answer 2

Answer:

time period is 0.1 seconds and frequency is 10 hrz.