A : In inelastic collision, a part of kinetic energy. convert into heat energy, sound energy and light energy etc.
R : The force of interaction in an inelastic collision is non-conservative in nature.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1).
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2).
C. If Assertion is true statement but Reason is false, then mark (3).
D. If both Assertion and Reason are falsė statements, then mark (4).

Answer

To analyze the statements provided in the question, we will break down the assertion (A) and the reason (R) step by step.

### Step 1: Understanding the Assertion (A)
- **Assertion (A)** states: "In an inelastic collision, a part of kinetic energy converts into heat energy, sound energy, and light energy, etc."
- In an inelastic collision, the colliding objects do not bounce off each other completely. Instead, they may stick together or deform, leading to a loss of kinetic energy.
- This lost kinetic energy is transformed into other forms of energy, such as heat (due to deformation), sound (noise produced during the collision), and sometimes light (if there is a spark or flash).
- Therefore, **Assertion (A) is true**.

### Step 2: Understanding the Reason (R)
- **Reason (R)** states: "The force of interaction in an inelastic collision is non-conservative in nature."
- A non-conservative force is one where the work done by the force depends on the path taken, and energy is not conserved. In inelastic collisions, the kinetic energy is not conserved; some of it is transformed into other forms of energy.
- Since energy is lost in the form of heat, sound, etc., this indicates that the forces involved are indeed non-conservative.
- Therefore, **Reason (R) is also true**.

### Step 3: Analyzing the Relationship Between A and R
- While both statements are true, we need to determine if R correctly explains A.
- Assertion A specifies that kinetic energy is converted into heat, sound, and light energy. Reason R states that the forces involved are non-conservative.
- Although the non-conservative nature of the forces explains why kinetic energy is not conserved, it does not specify that this energy is converted into heat, sound, or light.
- Thus, while both statements are true, R does not adequately explain A.

### Conclusion
- **Assertion (A) is true.**
- **Reason (R) is true, but it does not explain A.**
- The correct answer is that both A and R are true, but R is not the correct explanation of A.

### Final Answer
- The correct option is: Both A and R are true, but R is not the correct explanation of A.

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