Motion: Uniform and Non-Uniform Motion
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Questions and Answers

What is a characteristic of uniform motion?

  • Velocity remains constant (correct)
  • Speed increases exponentially with time
  • Velocity changes over time
  • Distance-travelled is not proportional to time

    • Which type of motion is characterized by a curved line on a distance-time graph?

  • Rotational motion
  • Circular motion
  • Non-uniform motion (correct)
  • Uniform motion

    • What does the slope of a speed-time graph represent?

  • Distance travelled by the object
  • Time taken by the object
  • Velocity of the object
  • Acceleration of the object (correct)

    • What is the unit of acceleration?

    <p>Meter per second squared (m/s²)</p> Signup and view all the answers

    An object is moving with a constant speed but changing direction. What type of motion is this?

    <p>Non-uniform motion</p> Signup and view all the answers

    A car accelerates from rest to a speed of 20 m/s in 4 seconds. What is its acceleration?

    <p>5 m/s²</p> Signup and view all the answers

    What is the definition of acceleration?

    <p>Rate of change of velocity</p> Signup and view all the answers

    A ball is thrown upwards. What type of motion does it undergo?

    <p>Non-uniform motion</p> Signup and view all the answers

    What does a horizontal line on a speed-time graph indicate?

    <p>Uniform motion</p> Signup and view all the answers

    Study Notes

    Motion

    Uniform Motion

    • Defined as motion with a constant speed in a straight line
    • Velocity (speed and direction) remains constant
    • Distance-travelled is proportional to time
    • Examples: a car moving at a constant speed on a straight road, a ball rolling on a horizontal surface

    Non-uniform Motion

    • Defined as motion with a changing speed or direction
    • Velocity (speed and direction) changes over time
    • Distance-travelled is not proportional to time
    • Examples: a car accelerating or decelerating, a ball thrown upwards

    Distance-time Graph

    • A graph that shows the relationship between distance travelled and time
    • Slope of the graph represents the speed of the object
    • A straight line on the graph indicates uniform motion
    • A curved line on the graph indicates non-uniform motion

    Speed-time Graph

    • A graph that shows the relationship between speed and time
    • Slope of the graph represents the acceleration of the object
    • A horizontal line on the graph indicates uniform motion (constant speed)
    • A curved or sloping line on the graph indicates non-uniform motion (changing speed)

    Acceleration

    • Defined as the rate of change of velocity
    • Measured in units of meters per second squared (m/s²)
    • Can be positive (accelerating) or negative (decelerating)
    • Calculated using the formula: acceleration = change in velocity / time
    • Examples: a car accelerating from rest, a ball falling under gravity

    Motion

    Uniform Motion

    • Motion with a constant speed in a straight line, resulting in a constant velocity
    • Distance-travelled is directly proportional to time, with no change in direction
    • Examples include a car moving at a constant speed on a straight road, and a ball rolling on a horizontal surface

    Non-uniform Motion

    • Motion with a changing speed or direction, resulting in a changing velocity
    • Distance-travelled is not directly proportional to time, with possible changes in direction
    • Examples include a car accelerating or decelerating, and a ball thrown upwards

    Graphs

    Distance-time Graph

    • A graph that shows the relationship between distance travelled and time
    • The slope of the graph represents the speed of the object
    • A straight line on the graph indicates uniform motion, while a curved line indicates non-uniform motion

    Speed-time Graph

    • A graph that shows the relationship between speed and time
    • The slope of the graph represents the acceleration of the object
    • A horizontal line on the graph indicates uniform motion (constant speed), while a curved or sloping line indicates non-uniform motion (changing speed)

    Acceleration

    • The rate of change of velocity, measured in meters per second squared (m/s²)
    • Can be positive (accelerating) or negative (decelerating)
    • Calculated using the formula: acceleration = change in velocity / time
    • Examples include a car accelerating from rest, and a ball falling under gravity

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    Description

    Understand the concept of uniform and non-uniform motion, including definitions, characteristics, and examples of each type of motion.

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