Two identical positive charges are fixed on the y-axis, at equal distances from the origin O. A particle with a negative charges starts on the x-axis at a large distance from O. moves along the x-axis passes through O, and moves far away from O on the other side. Its acceleration a is taken as positive along its direction of motion. Plot acceleration a of the particle against its x-coordinate.

Explanation

To solve the problem step by step, we will analyze the forces acting on the negatively charged particle as it moves along the x-axis in the presence of two identical positive charges fixed on the y-axis.

### Step 1: Understanding the Setup
We have two identical positive charges, \( +Q \), located at positions \( (0, d) \) and \( (0, -d) \) on the y-axis. A negatively charged particle, \( -q \), starts from a large distance on the x-axis, moves through the origin \( O(0,0) \), and continues to move away on the other side.

### Step 2: Analyzing Forces on the Particle
As the particle moves along the x-axis, it experiences electrostatic forces due to both positive charges. The force \( F \) exerted by each charge on the particle can be calculated using Coulomb's law:

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