The mass of a pendulum bob is 0.2kg, and it is suspended by a string 1m long. It is pulled aside until the thread is at `30^(@)` to the vertical. How much work is done ? The ball is now released. Find its K.E. at the lowest point ? Take `g=10ms^(-2).`

Explanation

To solve the problem step by step, we need to find the work done when the pendulum bob is raised to a height and then calculate its kinetic energy at the lowest point.

### Step 1: Determine the height raised by the pendulum bob
When the pendulum bob is pulled aside to an angle of \(30^\circ\), we need to calculate the vertical height it is raised.

1. The length of the string \(L = 1 \, \text{m}\).
2. The height \(h\) can be calculated using the cosine of the angle:
\[
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