The string of a pendulum is `2.0m` long. The bob is pulled sideways so that the string becomes horizontal and then the bob is released. What is the speed with which the bob arrives at the lowest point ? Assume theat `10%` of initial energy is dissipated against air resistance. Take `g=10m//s^(2)`

Explanation

To find the speed of the pendulum bob at the lowest point after being released from a horizontal position, we can follow these steps:

### Step 1: Understand the Initial Energy
When the bob is pulled to the horizontal position, it has potential energy due to its height. The height (h) from which the bob is released is equal to the length of the string (L) since it is horizontal.

- **Initial Potential Energy (PE_initial)** = mgh
- Here, h = L = 2.0 m, and g = 10 m/s².

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