Non-uniform Motion Along a Straight Line

Non-uniform motion is defined as motion where the velocity of the object changes over time. This means that over any given time interval, the velocity will be different at the start compared to the end.

Key Characteristics of Non-uniform Motion

• Velocity is not constant.
• The speed or direction of motion changes.
• Consequently, the change in velocity over any time interval is non-zero.

Evaluating the Options

Let's analyze the given options concerning an object in non-uniform motion along a straight line:

• Option 1: the change in velocity over any time interval is non zero. This statement accurately describes non-uniform motion. If the velocity changes, the difference between the velocity at the end of a time interval and the velocity at the beginning cannot be zero.
• Option 2: the change in velocity over any time interval is zero. This condition implies that the velocity is constant, which defines uniform motion, not non-uniform motion.
• Option 3: the velocity remains constant with time. This is the definition of uniform motion.
• Option 4: the velocity has same values at different points of the path. This indicates that the velocity does not change, signifying uniform motion.

Therefore, the essential characteristic of non-uniform motion along a straight line is that the velocity is changing, resulting in a non-zero change in velocity over any time interval.