Give one example of each of the following:
(a) uniform velocity (b) variable velocity
(c) variable acceleration (d) uniform retardation.

Explanation

To solve the question, we need to provide one example for each of the four categories: uniform velocity, variable velocity, variable acceleration, and uniform retardation. Here’s a step-by-step breakdown of the solution:

### Step 1: Example of Uniform Velocity
- **Definition**: Uniform velocity occurs when an object moves in a straight line at a constant speed.
- **Example**: A man walking at a constant speed of 5 m/s in a straight line.

### Step 2: Example of Variable Velocity
- **Definition**: Variable velocity occurs when an object changes its speed or direction over time.
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