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Physics with Calculus - Chapter 2: Motion and Kinematics

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이 집합의 용어 (20)

  • What is the difference between distance and displacement?
    Distance is the total length of the path traveled, while displacement is the straight-line vector from the initial to the final position.
  • How is average velocity defined?
    Average velocity is the displacement divided by the time interval during which the displacement occurred.
  • What does a motion diagram represent?
    A motion diagram shows the positions of an object at successive equal time intervals, illustrating its motion visually.
  • How can you tell if two blocks have the same speed from their position-time diagrams?
    If the blocks cover equal distances in equal time intervals, they have the same speed at those intervals.
  • What does a velocity-time graph show?
    A velocity-time graph shows how velocity changes over time; the slope represents acceleration.
  • What is the significance of the slope of a position-time graph?
    The slope of a position-time graph at any point is the instantaneous velocity at that time.
  • What is the difference between a secant line and a tangent line on a position-time graph?
    A secant line connects two points and gives average velocity; a tangent line touches one point and gives instantaneous velocity.
  • What does a flat horizontal line on a velocity-time graph indicate?
    A flat horizontal line means the object is moving at a constant velocity with zero acceleration.
  • How is acceleration related to velocity on a velocity-time graph?
    Acceleration is the slope of the velocity-time graph.
  • What happens to velocity and acceleration at the peak of a ball tossed in the air?
    At the peak, velocity is zero but acceleration is nonzero due to gravity.
  • What does a negative slope on a velocity-time graph indicate?
    A negative slope indicates negative acceleration or deceleration.
  • How do you interpret motion diagrams with arrows of different lengths?
    Arrow length represents speed; longer arrows mean higher speed.
  • What is instantaneous velocity?
    Instantaneous velocity is the velocity of an object at a specific instant, given by the slope of the tangent line on a position-time graph.
  • How can acceleration be zero while velocity is changing?
    Acceleration is zero only if velocity is constant; if velocity changes, acceleration is nonzero.
  • What does a velocity-time graph look like for constant acceleration?
    It is a straight line with a constant slope.
  • How do you find displacement from a velocity-time graph?
    Displacement is the area under the velocity-time curve.
  • What is the difference between speed and velocity?
    Speed is a scalar quantity representing magnitude of motion; velocity is a vector including direction.
  • What does a motion diagram with equally spaced dots indicate?
    Equally spaced dots indicate constant speed.
  • How is acceleration related to changes in velocity?
    Acceleration is the rate of change of velocity with respect to time.
  • What does a velocity-time graph with velocity crossing zero indicate?
    The object changes direction when velocity crosses zero.