Uniform Velocity Explained

Uniform velocity means that an object is moving at a constant speed in a straight line. Its velocity does not change over time.

Velocity-Time Graph Basics

A velocity-time graph plots the velocity of an object (on the vertical axis) against time (on the horizontal axis).

Velocity-Time Graph for Uniform Velocity

For an object moving with uniform velocity, the velocity remains constant regardless of time. On a velocity-time graph, this is represented by a horizontal line. This line is parallel to the time axis because the velocity value stays the same throughout the duration plotted on the time axis.

Analyzing Graph Options

• Option 1: It is a straight line parallel to the time axis. This correctly depicts uniform velocity, as the velocity value (y-coordinate) is constant over time (x-coordinate).
• Option 2: It is a curved line. A curved line on a velocity-time graph indicates that the velocity is changing, meaning there is acceleration. This does not represent uniform velocity.
• Option 3: It is a straight line parallel to the velocity axis. This would imply time is constant while velocity changes, which is not physically meaningful for describing motion over a period.
• Option 4: It is a straight line inclined to the time axis. A straight line inclined to the time axis represents constant acceleration, where velocity changes at a steady rate. This is not uniform velocity.

Therefore, the key feature of the velocity-time graph for an object moving with uniform velocity is a straight line parallel to the time axis.