If the velocity of an object is increasing and changing at a uniform rate then the acceleration of the object is
`"(i) Positive (ii) Zero"`
`" (iii) Negative (iv) Not defined"`

Answer

To solve the problem, we need to analyze the relationship between velocity, acceleration, and how they change over time.

### Step-by-Step Solution:

1. **Understanding the Problem**:
- We are given that the velocity of an object is increasing and changing at a uniform rate.

2. **Defining Acceleration**:
- Acceleration is defined as the rate of change of velocity with respect to time. Mathematically, it is expressed as:
\[ a = \frac{dv}{dt} \]
where \(a\) is acceleration, \(dv\) is the change in velocity, and \(dt\) is the change in time.

3. **Analyzing the Given Information**:
- Since the velocity is increasing, we can say that \(dv > 0\) (the change in velocity is positive).
- The phrase "changing at a uniform rate" implies that this change in velocity is consistent over time, meaning that \( \frac{dv}{dt} \) is constant.

4. **Determining the Sign of Acceleration**:
- If \( \frac{dv}{dt} \) is constant and positive, then acceleration \(a\) must also be positive:
\[ a = \frac{dv}{dt} > 0 \]

5. **Conclusion**:
- Since the acceleration is positive, we can conclude that the correct answer to the question is:
\[ \text{(i) Positive} \]

### Final Answer:
The acceleration of the object is **Positive**.

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