Assertion: A spherical water drops become flaton flatter surface.
Reason : It become flat due to gravity.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.

Answer

To solve the question, we need to analyze both the assertion and the reason provided.

**Assertion:** A spherical water droplet becomes flat on a flat surface.

1. **Understanding the Assertion:**
- Water droplets are generally spherical in shape due to surface tension, which minimizes the surface area for a given volume of liquid.
- When a spherical water droplet lands on a flat surface, it does not remain in a perfect spherical shape. Instead, it spreads out and flattens.

**Reason:** It becomes flat due to gravity.

2. **Understanding the Reason:**
- Gravity plays a significant role in the behavior of the droplet when it lands on a flat surface. The force of gravity pulls the droplet downwards, causing it to spread out and flatten.
- The flattening occurs because the droplet seeks to minimize its potential energy while also maintaining the balance between cohesive forces (due to surface tension) and gravitational forces.

**Conclusion:**
- Both the assertion and the reason are correct. The assertion correctly states that a spherical droplet becomes flat on a flat surface, and the reason accurately explains that this flattening occurs due to the influence of gravity.

**Final Answer:**
- Both assertion and reason are true, and the reason is a correct explanation of the assertion.

**Correct Option:** A

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