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This section explores the simplest form of motion, which is motion along a straight line. It defines key terms like distance and displacement, highlights their differences, and introduces concepts of uniform and non-uniform motion, referencing real-world examples and simplifying equations.
In this section, we delve into the fundamental type of motion: motion along a straight line. Motion is perceived when the position of an object changes over time. To fully understand motion, we must differentiate between two key concepts: distance and displacement.
Additionally, we explore the ideas of uniform motion (constant speed) versus non-uniform motion (varying speed), outlining their characteristics and applications. Graphs and simple equations are introduced to model these motions mathematically, such as distance-time graphs, which can depict uniform or non-uniform speeds visually. Knowing these principles is crucial for understanding more complex motions, including accelerated and circular motions, which are covered in subsequent sections.
Motion: A change of position of an object.
Distance: The total length of the path traveled without direction.
Displacement: The shortest path with direction from start to finish.
Uniform Motion: Motion at constant speed.
Non-Uniform Motion: Motion where speed is not constant.
When you measure distance, just count each stride; for displacement, it's a straight line to guide.
Think of a hiker who wanders around a mountain: he walks 100 meters to the left, then 100 back to the right. His distance is 200 meters, but his displacement? Zero, for he returned to the start.
Use 'D for Distance (just a number) and D for Displacement (direction included)'.
An athlete running around a track completes a circuit covering a distance while his displacement is zero if he returns to the starting point.
A bus traveling from point A to B and then back to A demonstrates non-uniform motion evidenced by varying speeds due to traffic.
Term: Distance
Definition: The total length of the path traveled by an object without regard to direction.
The total length of the path traveled by an object without regard to direction.
Term: Displacement
Definition: The shortest straight-line distance from the starting point to the endpoint, including direction.
The shortest straight-line distance from the starting point to the endpoint, including direction.
Term: Velocity
Definition: The speed of an object in a specific direction.
The speed of an object in a specific direction.
Term: Acceleration
Definition: The rate of change of velocity per unit time.
The rate of change of velocity per unit time.
Term: Uniform Motion
Definition: Motion at a constant speed in a straight line.
Motion at a constant speed in a straight line.
Term: NonUniform Motion
Definition: Motion where speed changes at different times.
Motion where speed changes at different times.