What is the time period of a simple pendulum if length of the pendulum is equal to the radius of Earth ?

Explanation

To find the time period of a simple pendulum whose length is equal to the radius of the Earth, we can follow these steps:

### Step 1: Identify the Length of the Pendulum
The length \( L \) of the pendulum is given as equal to the radius of the Earth. The radius of the Earth is approximately \( 6400 \) km. We need to convert this into meters:
\[ L = 6400 \, \text{km} = 6400 \times 10^3 \, \text{m} = 6.4 \times 10^6 \, \text{m} \]

...