Question

a simple pendulum takes 40 second to complete 20 oscillations. find time period of the pendulum​

Answer 1

Answer:

2 is the answer.........

Answer 2

Answer:

Explanation:

Time period of an oscillating object is given by,

$Time\ period\ (T)= \frac{1}{Frequency\ (f)}$                    ...(1)

This is the time required to complete one oscillation

The inverse of the frequency is the time period of the oscillating body.

The frequency of oscillations of a vibrating body is the ratio of the number of oscillations of that body per second.

It can be expressed as,

$Frequency\ (f) = \frac{Number\ of\ oscillations\ (N)}{Time\ (t)}$     ...(2)

In the question, it is given that,

$N = 20$

$t = 40\ s$

Substituting these values into equation (1) and equation (2)

$f = \frac{20}{40} = 0.5\ Hz$

Now

$T = \frac{1}{0.5} =2 \ s$