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24 Cards in this Set
- Front
- Back
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kinematics |
the name for the mathematical description of motion. Kinema is the Greek word for "movement" |
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position-vs-time graph |
a continuous curve that shows an object's position as a function of time. |
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a graph is... |
an abstract representation of motion |
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speed is the |
magnitude of the velocity vector and is always positive. |
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Vx = |
delta x over delta t |
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Vy = |
delta y over delta t |
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slope of graph = |
rise over run
or
delta x over delta t |
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a faster speed corresponds to |
a steeper slope |
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The slope of an object's position-vs-time graph is... |
the object's velocity at the point in the motion. |
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slope is a _____ quantity. |
geometrical |
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velocity is a _____ quantity |
physical |
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velocity-vs-time graph: |
a graph that shows an object's velocity as a function of time. |
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The value of the velocity graph at any instance of time equals... |
the slope of the position graph. |
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uniform motion: |
straight-line motion in which equal displacements occur during any successive equal-time intervals. aka constant velocity motion |
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constant-velocity motion |
straight-line motion in which equal displacements occur during any successive equal-time intervals. aka uniform motion |
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An object's motion is uniform... |
if and only if its position-vs-time graph is a straight line! |
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Xf = |
Xi +( Vx times delta t) |
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Vx times delta t = |
delta x |
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proportionality constant = |
C |
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y is proportional to x if... |
they are related by an equation of the form: y = Cx |
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displacement on a graph is... |
the area under a velocity-vs-time graph.
delta x equals (Vx times delta t) |
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instantaneous velocity: |
an object's velocity (speed & direction) at a specific instant of time t. |
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instantaneous velocity (Vx) at time (t) = |
slope of position graph at time (t) |
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the slope of the tangent line is... |
the instantaneous velocity at that instant of time. |
