Though the forces are balanced at the mean position, even then the bob crosses over to the other extreme position after being released. This is due to

Options

A. inertia of the bob
B. potential energy of the bob
C. velocity of the bob
D. none of these

Answer

To solve the question "Though the forces are balanced at the mean position, even then the bob crosses over to the other extreme position after being released. This is due to", we can break it down step by step:

### Step-by-Step Solution:

1. **Understanding the Mean Position**:
- The mean position of a pendulum is where the net forces acting on the bob are balanced. At this point, the tension in the string equals the weight of the bob (mg), resulting in a net force of zero.

2. **Releasing the Bob**:
- When the bob is displaced from the mean position to one of the extreme positions and then released, it begins to move downward due to gravitational force.

3. **Motion and Velocity**:
- As the bob moves downwards from the extreme position to the mean position, it accelerates due to gravity, gaining speed. At the mean position, it reaches its maximum velocity.

4. **Inertia at the Mean Position**:
- Even though the forces are balanced at the mean position (net force is zero), the bob does not stop there. This is because of inertia, which is the tendency of an object in motion to remain in motion unless acted upon by an external force.

5. **Crossing the Mean Position**:
- The bob continues to move past the mean position due to its inertia. It has kinetic energy at the mean position, which allows it to move to the other extreme position.

6. **Conclusion**:
- Therefore, the reason the bob crosses over to the other extreme position after being released, despite the forces being balanced at the mean position, is due to the inertia of the bob.

### Final Answer:
The correct option is **Option 1: Inertia of the Bob**.

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