NCERT Solutions for Class 9 Science Chapter 8
Motion
NCERT Books for Session 2022-2023
CBSE Board and UP Board
Intext Questions
Page No-107
Questions No-1
What is the nature of the distance-time graphs for uniform and non-uniform motion of an object?
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• The slope of the distance-time graph for an object in uniform motion is straight line.
• The slope of the distance-time graph for an object in non-uniform motion is not a straight line.
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Distance-Time Graphs for Uniform and Non-Uniform Motion:
Uniform Motion:
– Graph Shape: A distance-time graph for uniform motion appears as a straight line with a constant slope.
– Characteristics:
– Represents motion at a constant velocity.
– Equal distances are covered in equal intervals of time.
– Linear and uniform graph indicating consistent speed.
– Key Point: In uniform motion, the slope of the graph signifies the constant speed of the object.
Non-Uniform Motion:
– Graph Shape: A distance-time graph for non-uniform motion is non-linear, lacking a constant slope.
– Characteristics:
– Exhibits varied shapes, curves, or changing slopes.
– Unequal distances covered in equal intervals of time.
– Reflects changing speeds or directions of motion.
– Key Point: Different sections of the graph represent varying speeds or changes in the direction of motion.
Summary:
– Uniform Motion:
– Graph: Straight line with a constant slope.
– Indicates constant speed, equal distances in equal time intervals.
– Non-Uniform Motion:
– Graph: Non-linear, with changing slopes or curves.
– Reflects varying speeds or changes in motion direction, unequal distances in equal time intervals.
Understanding distance-time graphs is crucial for interpreting an object’s motion characteristics. Uniform motion is visually depicted by a straight line with a constant slope, while non-uniform motion is represented by a non-linear graph showcasing changing slopes or curves, indicating variations in speed or direction over time.