Class 9 Physics Chapter 6: Motion and Time
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Questions and Answers

What is the force that opposes motion between two surfaces in contact?

  • Normal force
  • Gravitational force
  • Frictional force (correct)
  • Electromagnetic force
  • What is the type of friction that occurs when an object is stationary and is subjected to an external force?

  • Rolling friction
  • Kinetic friction
  • Static friction (correct)
  • Fluid friction
  • What is the force that acts perpendicular to the surface and is responsible for the normal contact between two surfaces?

  • Normal force (correct)
  • Gravitational force
  • Frictional force
  • Tangential force
  • What is the type of friction that occurs when an object is moving and is subjected to an external force?

    <p>Kinetic friction</p> Signup and view all the answers

    What is the force that acts along the surface and is responsible for the frictional force between two surfaces?

    <p>Tangential force</p> Signup and view all the answers

    Match the types of friction with their descriptions:

    <p>Static friction = Friction that occurs when an object is stationary and is subjected to an external force Kinetic friction = Friction that occurs when an object is moving and is subjected to an external force Rolling friction = Friction that occurs when an object is rolling on a surface Fluid friction = Friction that occurs when an object is moving through a fluid</p> Signup and view all the answers

    Match the forces with their effects:

    <p>Normal force = Acts perpendicular to the surface and is responsible for the normal contact between two surfaces Frictional force = Acts along the surface and is responsible for the frictional force between two surfaces Applied force = Causes an object to accelerate Gravity = Attracts objects towards each other</p> Signup and view all the answers

    Match the types of surfaces with their effects on friction:

    <p>Smooth surface = Reduces frictional force Rough surface = Increases frictional force Inclined surface = Changes the direction of the normal force Horizontal surface = Does not change the direction of the normal force</p> Signup and view all the answers

    Match the effects of friction with their descriptions:

    <p>Heat generation = Heat produced due to friction Wear and tear = Damage to surfaces due to friction Energy loss = Energy lost due to friction Sound production = Sound produced due to friction</p> Signup and view all the answers

    Match the factors with their effects on friction:

    <p>Surface area = Increases frictional force Normal force = Increases frictional force Surface roughness = Increases frictional force Velocity = Decreases frictional force</p> Signup and view all the answers

    Study Notes

    Since the text is "Generate a exam for me class 9 physics carvan books house chapter 6 and e", I'm assuming you want study notes for Class 9 Physics, Carvan Books House, Chapter 6 (Motion and Time) and possibly Chapter E (not specified). Here are the notes:

    Motion

    • Motion is a change in the position of an object over time
    • It can be described in terms of distance, displacement, speed, velocity, and acceleration

    Types of Motion

    • Rectilinear motion: motion along a straight line
    • Circular motion: motion in a circular path
    • Oscillatory motion: repetitive back-and-forth motion

    Distance and Displacement

    • Distance: total length of the path travelled by an object
    • Displacement: shortest distance between initial and final positions

    Speed and Velocity

    • Speed: distance travelled per unit time
    • Velocity: displacement per unit time
    • Velocity is a vector quantity, having both magnitude and direction

    Acceleration

    • Acceleration: change in velocity per unit time
    • It is a vector quantity, having both magnitude and direction
    • SI unit of acceleration is m/s²

    Graphical Representation of Motion

    • Distance-time graph: a straight line represents uniform motion
    • Velocity-time graph: a straight line represents uniform acceleration
    • Acceleration-time graph: a straight line represents uniform change in acceleration

    Since the text is "Generate a exam for me class 9 physics carvan books house chapter 6 and e", I'm assuming you want study notes for Class 9 Physics, Carvan Books House, Chapter 6 (Motion and Time) and possibly Chapter E (not specified). Here are the notes:

    Motion

    • Motion is a change in the position of an object over time
    • It can be described in terms of distance, displacement, speed, velocity, and acceleration

    Types of Motion

    • Rectilinear motion: motion along a straight line
    • Circular motion: motion in a circular path
    • Oscillatory motion: repetitive back-and-forth motion

    Distance and Displacement

    • Distance: total length of the path travelled by an object
    • Displacement: shortest distance between initial and final positions

    Speed and Velocity

    • Speed: distance travelled per unit time
    • Velocity: displacement per unit time
    • Velocity is a vector quantity, having both magnitude and direction

    Acceleration

    • Acceleration: change in velocity per unit time
    • It is a vector quantity, having both magnitude and direction
    • SI unit of acceleration is m/s²

    Graphical Representation of Motion

    • Distance-time graph: a straight line represents uniform motion
    • Velocity-time graph: a straight line represents uniform acceleration
    • Acceleration-time graph: a straight line represents uniform change in acceleration

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    Description

    Test your knowledge of motion, its types, and related concepts such as distance, displacement, speed, velocity, and acceleration. Covers Chapter 6 of Carvan Books House Class 9 Physics.

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