The length of the second's pendulum in a clock is increases to 4 times its initial length. Calculate the number of oscillations completed by the new pendulum in one minute.

Explanation

To solve the problem, we need to determine the number of oscillations completed by a new pendulum whose length has increased to four times its initial length. We will follow these steps:

### Step 1: Understand the Concept of a Second's Pendulum
A second's pendulum is defined as a pendulum that has a time period of 2 seconds. This means it takes 2 seconds to complete one full oscillation (back and forth).

### Step 2: Write the Formula for the Time Period of a Simple Pendulum
The time period \( T \) of a simple pendulum is given by the formula:
\[
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