Two boys are holding a horizontal rod of length L and weight W through its two ends. If now one of the boys suddenly leaves the rod, what is the instantaneous reaction force experienced by the other boy ?

Explanation

To solve the problem, we need to analyze the situation when one of the boys suddenly leaves the rod. We will use the principles of rotational motion and dynamics to find the instantaneous reaction force experienced by the other boy.

### Step-by-Step Solution:

1. **Identify the System**:
- We have a horizontal rod of length \( L \) and weight \( W \) held at both ends by two boys. When one boy leaves, the other boy will experience a change in force.

2. **Determine the Weight's Position**:
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