A body is moving on a rough horizontal surface with uniform velocity. Which of the following statement is in accordance with the Newtons first law of motion?

Options

A. No forces are acting on the body
B. The net force on the body is zero
C. The kinetic energy of the body is continuously decreasing
D. The kinetic energy of the body is continuously increasing

Answer

To solve the question regarding a body moving on a rough horizontal surface with uniform velocity and identify which statement is in accordance with Newton's first law of motion, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Situation**:
- A body is moving on a rough horizontal surface with a uniform velocity. This means that the speed and direction of the body are constant.

**Hint**: Recall that uniform velocity implies no change in speed or direction.

2. **Applying Newton's First Law of Motion**:
- Newton's first law states that an object will remain at rest or in uniform motion unless acted upon by a net external force. This means if the body is moving with uniform velocity, the net force acting on it must be zero.

**Hint**: Think about what it means for forces to be balanced.

3. **Considering Forces Acting on the Body**:
- On a rough surface, friction will act on the body in the opposite direction of its motion. Since the body is moving with uniform velocity, there must be another force acting in the direction of motion that balances the frictional force.

**Hint**: Identify the forces: friction and the applied force.

4. **Analyzing the Statements**:
- **Option A**: "No force acting on the body." - This cannot be true because friction is acting on the body.
- **Option B**: "Net force acting on the body." - This is misleading; the net force is zero, but the forces are balanced.
- **Option C**: "Kinetic energy of body is continuously decreasing." - This is incorrect because the body is moving with uniform velocity, so kinetic energy remains constant.
- **Option D**: "Kinetic energy of body is continuously increasing." - This is also incorrect for the same reason as above.

**Hint**: Evaluate each statement based on the conditions of motion and forces.

5. **Identifying the Correct Statement**:
- The correct interpretation of Newton's first law in this scenario is that the net force on the body is zero. Therefore, the statement that aligns with this is that the net force acting on the body is zero, which corresponds to the idea that the forces are balanced.

**Hint**: Look for the statement that reflects the balance of forces.

### Conclusion:
The statement that is in accordance with Newton's first law of motion is that the net force acting on the body is zero, which means the body continues to move with uniform velocity despite the presence of friction.

### Final Answer:
**Option B**: The net force acting on the body is zero (implying that the forces are balanced).