Physics - Motion in One Dimension Vocab

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Physics

Kinematics & Dynamics

Last updated 10:22 PM on 9/27/22
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32 Terms

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Kinematics
The study of the motion of objects
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Mechanics
The study of the motion of an object and the forces acting on it
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Dynamics
The study of the cause of motion
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Frame of Reference
A stationary object used to describe the position of a moving object
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Distance
The length of the path between two points (SI - meters)
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Displacement
The shortest distance between two points (SI - meters)
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Position
The location of an object at any time
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Magnitude
The size or amount of something
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Coordinate Axes
A set of perpendicular lines which define coordinates relative to the origin
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Vector
A quantity that has magnitude and direction
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Scalar
A quantity that has magnitude but no direction
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Speed
The rate of change of position of an object (SI - m/s)
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Average Speed
The distance traveled divided by the time during which the motion occurs
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Instantaneous Speed
The speed at a specific instant in time
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Constant Speed
Equal distance in equal intervals of time
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Changing Speed
Unequal distance in equal intervals of time
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Velocity
The rate of change of position of an object with a particular direction - speed + direction (SI - m/s)
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Average Velocity
The displacement of an object divided by the total time
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Instantaneous Velocity
The velocity at a specific instant in time
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Uniform/Constant Velocity
Equal displacement in equal intervals of time
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Changing Velocity
Unequal displacement in equal intervals of time
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Acceleration
The rate at which velocity changes (SI - m/s^2)
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Average Acceleration
The change in velocity of an object divided by the total time
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Acceleration due to Gravity
The acceleration of a free falling object - about 9.8m/s^2
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Graphical Analysis
Technique used to determine trends, relationships, make predictions and develop a mathematical model
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Position Time Graph - Straight Line
Constant velocity - constant slope (from line we can find velocity)
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Position Time Graph - Curve(y)
Changing velocity - changing slope
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Position Time Graph - Horizontal Line
Standing still
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Velocity Time Graph - Diagonal Line
We get acceleration from the slope
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Velocity Time Graph - Horizontal Line
Constant velocity - area under line = displacement (not still)
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Velocity Time Graph - Curving Diagonal Line
Changing velocity
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Acceleration Time Graph - Horizontal Line
Constant acceleration