A cannon after firing recoils due to

Options

A. conservation of energy
B. backward thrust of gases produced
C. Newton's third law of motion
D. Newton's first law of motion

Answer

To solve the question "A cannon after firing recoils due to," we will analyze the options provided and determine the correct answer step by step.

### Step 1: Understand the Concept of Recoil
When a cannon fires a projectile, it experiences a backward movement known as recoil. This phenomenon can be explained using the principles of physics.

### Step 2: Analyze the Options
1. **Conservation of Energy**: This principle states that energy cannot be created or destroyed, only transformed. While energy is involved in the firing process, it does not directly explain the recoil.

2. **Backward Thrust of Gases**: When the cannon fires, gases produced from the combustion of gunpowder expand rapidly and push the projectile forward. This could suggest a backward thrust, but it doesn't fully explain the fundamental reason for recoil.

3. **Newton's Third Law of Motion**: This law states that for every action, there is an equal and opposite reaction. When the cannon fires the projectile forward (action), the cannon itself experiences a backward force (reaction). This is the most relevant explanation for the recoil.

4. **Newton's First Law of Motion**: This law states that an object at rest will remain at rest unless acted upon by a net external force. While this law is important in understanding motion, it does not specifically explain the recoil of the cannon.

### Step 3: Identify the Correct Answer
Based on the analysis, the most appropriate explanation for the recoil of the cannon after firing is **Newton's Third Law of Motion**. The action of firing the projectile results in an equal and opposite reaction, which is the recoil of the cannon.

### Conclusion
The cannon after firing recoils due to **Newton's Third Law of Motion**.

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