Question

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

Answer 1

Time period is the time required to complete one oscillation. Or it is the inverse of time period.

Therefore,

Time Period is = 1/10 = 0.1 seconds

Frequency of oscillations is the number of oscillations of a vibrating object per second.

Therefore,

Frequency is =  40 vibrations/4 seconds = 10 Hertz.

Hope it will help ya :)

Answer 2

Explanation:

Numbers of occilation=40

N=40

Time=4 sec

t=4sec

Frequency=N/T

f=40/4

f=10Hz

Time period=1/f

T=1/10

T=0.1sec

Hence the time period is 0.1 second and frequency is 10 Hz