In an experiment to measure the time-period of a simple pendulum, the time for 20 complete oscillations was found to be 36 s. What is the time-period of this pendulum ?

Answer

To find the time period of a simple pendulum, we can follow these steps:

### Step 1: Understand the Definition of Time Period
The time period (T) of a pendulum is the time taken to complete one full oscillation.

### Step 2: Identify the Total Time for Multiple Oscillations
In the experiment, it is given that the time taken for 20 complete oscillations is 36 seconds.

### Step 3: Calculate the Time Period
To find the time period (T) of one oscillation, we can use the formula:
\[ T = \frac{\text{Total Time}}{\text{Number of Oscillations}} \]

### Step 4: Substitute the Values
Substituting the values we have:
\[ T = \frac{36 \text{ seconds}}{20} \]

### Step 5: Perform the Calculation
Now, we perform the calculation:
\[ T = 1.8 \text{ seconds} \]

### Conclusion
The time period of the pendulum is 1.8 seconds.

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