This set covers Abeka Physics Chapter 6: "Introduction to Motion" (pages 80-93).

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  • kinematics

    the study of motion without regard to force

    translational motion

    term for any change in position

    rectilinear motion

    term for translational motion along a straight line

    curvilinear motion

    term for translational motion along a curved line

    speed

    term meaning the distance an object moves per unit of time

    velocity

    term for speed in a single stated direction

    vector

    term for any quantity having both a magnitude and a direction

    scalar

    term for any quantity that has a magnitude but no direction

    constant velocity (uniform motion)

    term for rectilinear motion with no change in speed

    variable velocity

    term for motion involving starts, stops, and maneuvers

    average speed

    When an object has variable motion, it is convenient to describe its rate of progress along its actual path in terms of ____ ____.

    displacement

    term for the distance between two points in a straight line

    average velocity

    the way we describe the straight-line motion of an object that does not actually travel a single direction with constant speed

    sign convention

    a way of showing positive and negative direction

    point of reference

    term for the point that all motion is compared to

    instantaneous velocity

    term for the velocity at any given moment in time

    trend line

    term for the line drawn through the average positions of the various data points on a graph

    slope

    Velocity is equal the ___ of the trend line on a graph.

    acceleration

    term for any change in velocity per unit time

    average acceleration

    term for a change in velocity divided by the time required for the change

    uniformly accelerated

    When the acceleration of an object is constant from one time interval to the next, its motion is _____ ______.

    variably accelerated

    When the acceleration of an object is not uniform from one time interval to the next, its motion is ____ ______.

    instantaneous acceleration

    The slope of the tangent to the curve at a given point on the velocity vs. time graph represents _______ _______.

    deceleration

    term for negative acceleration

    gravity and air resistance

    two forces that act on a falling object

    free fall

    If an object falling toward the earth has no forces acting on it except gravity (ignoring air resistance), that object is in ___ ____.

    9.80 m/s^2 (32.2 ft/s^2)

    the value of gravity

    altitude

    factor that affects the value of gravity

    False

    True or False: The value of gravity is greater at a higher altitude.

    surface area, mass

    An object with a large ____ ___ in relation to its ___ experiences more air resistance.

    terminal velocity

    term for the fastest velocity at which an object can fall

    when the force of air resistance equals the weight of the object

    When does a falling object reach its terminal velocity?

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