Physics: Chapter Two Displacement and Velocity
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Questions and Answers

What is the definition of displacement?

  • The length of the path an object travels divided by the total elapsed time
  • The difference between speed and velocity
  • The change in position of an object, including both magnitude and direction (correct)
  • The coordinate of the object’s initial position

    • What is the main difference between speed and velocity?

  • Speed is a scalar quantity, while velocity is a vector quantity (correct)
  • Speed is the displacement of an object, while velocity is the change in position
  • Speed is a vector quantity, while velocity is a scalar quantity
  • Speed has both magnitude and direction, while velocity only has magnitude

    • What is the graphical interpretation of velocity?

  • The area under the velocity-time graph (correct)
  • The distance traveled by an object
  • The coordinate of the object’s initial position
  • The length of the path an object travels divided by the total elapsed time

    • What is the average speed of an object over a given time interval?

    <p>The length of the path it travels divided by the total elapsed time</p> Signup and view all the answers

    How is average velocity defined during a time interval?

    <p>The displacement of the object divided by the total elapsed time</p> Signup and view all the answers

    What does the average velocity of an object during a time interval represent?

    <p>The slope of the straight line joining the initial and final points on a position versus time graph</p> Signup and view all the answers

    What is the definition of instantaneous acceleration?

    <p>The limit of the average acceleration as the time interval goes to zero</p> Signup and view all the answers

    What is the significance of the area under the graph of velocity versus time for an object?

    <p>It represents the displacement of the object</p> Signup and view all the answers

    How is a freely falling object defined?

    <p>Any object moving freely under the influence of gravity alone, regardless of its initial motion</p> Signup and view all the answers

    When an object moves with constant acceleration, what happens to its instantaneous acceleration?

    <p>It is equal to the value of the average acceleration over the entire time interval</p> Signup and view all the answers

    In the Cartesian coordinate system, how are points represented?

    <p>By ordered pairs (x, y)</p> Signup and view all the answers

    What is the primary purpose of the polar coordinate system?

    <p>To describe the location of a point in terms of its distance from the origin and direction</p> Signup and view all the answers

    What is a characteristic of scalar quantity?

    <p>It is completely specified by a single value with an appropriate unit</p> Signup and view all the answers

    In the polar coordinate system, what does θ represent?

    <p>The angle measured counterclockwise from the positive horizontal axis</p> Signup and view all the answers

    Which coordinate system is well-suited for describing the location of a point using horizontal and vertical distances?

    <p>Cartesian coordinate system</p> Signup and view all the answers

    What is always non-negative in the polar coordinate system?

    <p>The radial distance, r</p> Signup and view all the answers

    Which quantity has no direction?

    <p>Scalar quantity</p> Signup and view all the answers

    In which coordinate system are points represented by ordered pairs (r, θ)?

    <p>Polar coordinate system</p> Signup and view all the answers

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