The motion of a particle in straight line is an example of

Options

A. constant velocity motion
B. uniformly acceleration motion
C. non-uniformly acceleration motion
D. zero velocity motion

Explanation

To determine the type of motion of a particle in a straight line, we need to analyze the options provided:

1. **Constant Velocity Motion**: In this type of motion, the particle moves with a constant speed in a straight line, which means the acceleration is zero. However, the question asks for the general case of motion in a straight line, which can include other types of motion as well. Thus, this option is not the most accurate.

2. **Uniformly Accelerated Motion**: In uniformly accelerated motion, the velocity of the particle changes by equal amounts in equal intervals of time. This type of motion can indeed occur in a straight line, making this option a valid example of straight-line motion.

3. **Non-Uniformly Accelerated Motion**: In this case, the velocity of the particle changes by unequal amounts in unequal intervals of time. While this can also occur in a straight line, it does not represent a specific type of motion that is consistently straight, as the acceleration can vary.

4. **Zero Velocity Motion**: This implies that the particle is at rest and not moving at all. While this is a state of motion, it does not represent the general case of motion in a straight line.

Based on the analysis of the options:

- The correct answer is **Option 2: Uniformly Accelerated Motion**. This type of motion can occur in a straight line and is characterized by a constant rate of change of velocity.

### Step-by-Step Solution:
1. **Identify the types of motion**: Review the definitions of constant velocity motion, uniformly accelerated motion, non-uniformly accelerated motion, and zero velocity motion.

2. **Evaluate Constant Velocity Motion**: Recognize that this type of motion has zero acceleration, but it does not encompass all straight-line motion.

3. **Evaluate Uniformly Accelerated Motion**: Understand that this involves a constant change in velocity over equal time intervals, which can occur in a straight line.

4. **Evaluate Non-Uniformly Accelerated Motion**: Acknowledge that this type involves varying changes in velocity, which does not consistently represent straight-line motion.

5. **Evaluate Zero Velocity Motion**: Realize that this represents a state of rest and does not indicate motion.

6. **Select the correct option**: Based on the evaluations, conclude that the motion of a particle in a straight line is best represented by uniformly accelerated motion.