Physics Unit 3: Acceleration Flashcards
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Questions and Answers

What is the definition of Acceleration?

  • Distance covered per unit time
  • Change in velocity over time
  • Rate of change of velocity plus net result of forces (correct)
  • Constant change in speed
  • What is Average Acceleration?

    Change in velocity divided by elapsed time

    Constant Acceleration means that the velocity of a moving object does not change over time.

    False

    What is Velocity?

    <p>A physical vector quantity defined by both magnitude and direction</p> Signup and view all the answers

    How is Average Velocity calculated?

    <p>Displacement divided by time</p> Signup and view all the answers

    In a Velocity vs Time graph, the slope represents acceleration.

    <p>True</p> Signup and view all the answers

    What is Free Fall?

    <p>Motion of a body where its weight is the only force acting upon it</p> Signup and view all the answers

    What is the acceleration due to Gravity?

    <p>9.8 m/s^2 or 10 m/s^2</p> Signup and view all the answers

    What is the formula for velocity in terms of acceleration and time?

    <p>v = at</p> Signup and view all the answers

    What does the formula d = 1/2(at^2) represent?

    <p>Displacement = 1/2(acceleration)(time squared)</p> Signup and view all the answers

    Constant Velocity means an object travels the same distance every second.

    <p>True</p> Signup and view all the answers

    What is Weight?

    <p>Force of gravity on the object defined as mass times acceleration of gravity</p> Signup and view all the answers

    What is Displacement?

    <p>Overall change in position of an object</p> Signup and view all the answers

    What are Motion Graphs or Diagrams?

    <p>Pictorial descriptions of an object in motion</p> Signup and view all the answers

    Study Notes

    Acceleration

    • Defined as the rate of change of velocity, influenced by all forces acting on an object.
    • Formula: a = (v final - v initial) / (t final - t initial).
    • Measured in metres per second squared (m/s²).

    Average Acceleration

    • Calculated as the change in velocity over an elapsed time.

    Constant Acceleration

    • Occurs when an object's velocity remains unchanged during a time period.

    Velocity

    • A vector quantity that includes both magnitude and direction.
    • Measured in meters per second (m/s).

    Average Velocity

    • Determined by dividing displacement by the time taken.

    Velocity vs Time Graph

    • Represents velocity (in m/s) on the y-axis; slope indicates acceleration.
    • Similar in structure to position vs time graphs.

    Free Fall

    • The motion of a body solely affected by its weight, without any other forces acting on it.

    Gravity

    • The universal force of attraction between all masses; near Earth's surface, its approximate value is 9.8 m/s² (often rounded to 10 m/s²).

    Velocity Equation

    • Expressed as v = at, where v is velocity, a is acceleration, and t is time.

    Displacement Equation

    • Given by d = 1/2(at²), relating displacement (d) to acceleration (a) and time (t).

    Constant Velocity

    • Characterizes motion where an object covers equal distances in equal time intervals.

    Weight

    • Defined as the force due to gravity acting on an object, calculated with w = mg (mass × acceleration due to gravity).
    • Measured in newtons (N) as a unit of force.

    Displacement

    • A vector quantity reflecting the overall change in position of an object, or the difference between final and initial positions.

    Motion Graphs or Diagrams

    • Visual representations of an object's movement that illustrate position, velocity, and acceleration at key points in time.

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    Review key concepts related to acceleration in Physics with these flashcards. Understand terms like average acceleration and the mathematical definitions connected to Newton's Second Law. Perfect for students preparing for exams or needing a quick refresh on the unit.

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