Non-Uniform Linear Velocity Explained

Non-uniform linear velocity describes motion where an object travels along a straight path but its speed changes over time. This change in speed indicates acceleration.

Analyzing Motion Scenarios

• Option 1: A body moving in a straight line at fixed speed
  This represents uniform linear velocity because both speed and direction are constant.
• Option 2: A car moving at constant speed
  If the car moves in a straight line, this is uniform linear velocity. If the car changes direction, its velocity is non-uniform, but the focus here is on linear velocity, implying a straight path with constant speed.
• Option 3: A train starting from rest
  A train starting from rest begins with zero speed and increases its speed over time. This change in speed while moving along a likely straight track signifies non-uniform linear velocity.
• Option 4: A ball rolling at uniform rate
  'Uniform rate' implies constant speed. If the ball rolls in a straight line, this is uniform linear velocity.

Identifying Non-Uniform Velocity

The key characteristic of non-uniform linear velocity is a changing speed along a straight line. Only the scenario where the train starts from rest explicitly describes this change (speed increasing from zero).