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Definition
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Definition
A description of motion that includes the distance and direction of the motion |
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The rate of change in position |
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The rate of motion at any given moment |
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Is determined by the total distance an object travels during the total time traveled
s=d
t
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Standard unit of SI measurement for speed |
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Descibes the speed and direction of a moving object |
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The rate of change of velocity |
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standard unit of SI measurement for acceleration |
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Definition
occurs when velocity and acceleration are in the same direction
or
an object is increasing speed without changing direction |
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Definition
occurs when the velocity and acceleration of a moving object occur in different directions
or
when an object is slowing down or changing direction |
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formula for calculating acceleration |
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formula for calculating speed |
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Definition
forces that are equal in size, but opposite in direction |
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Definition
forces that create a net force that changes the velocity of an object
forces that are not equal in size, but opposite in direction
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Definition
an example of a force in which one object pulls on another
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Definition
two factors that determine the strength of a gravitational pull |
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Definition
a pushing force that interferes with the motion of an object and can only occur if two objects are in contact with one another |
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Newton's First Law of Motion |
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Definition
Also known as Law of Inertia
An object moving at constant velocity keeps moving at that velocity unless a net force acts on it |
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Definition
The tendency of an object to resist a change in its motion |
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Definition
Determines the amount of inertia of an object |
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Newton's Second Law of Motion |
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A net force acting on an ojbect causes the object to accelerate in the direction of the force |
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Definition
Formula for calculating force |
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Definition
Greater acceleration requires ________ _______ |
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Definition
Is an SI derived unit for force that is equal to 1 kg x m/s2 |
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Gravitational pull and inertia |
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Definition
In the absence of air, falling objects will generally fall at the same rate due to the combined effects of ______ and ______. |
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Definition
Graviational acceleration for objects falling to Earth's surface is _____. |
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Definition
When an object is influenced only by gravity it is said to be in ______.
These objects appear to be ___. |
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Definition
The force air exerts on a moving object.
(It works in the opposite direction of the moving object)
(Depends on the speed, size, shape, and density of the moving object) |
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Definition
Air resistance can be modified by increasing or decreasing the _________ of an object |
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The highest velocity that can be reached by a falling object |
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Definition
anything that is thrown or shot through air
has both horizontal and vertical motion at the same time
(path is curved as if falls through air)
Still falls to Earth at the same rate as an object that is simply dropped |
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Definition
acceleration toward the center of a curved or circular path |
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Definition
forces that act toward the center of a path |
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Newton's Third Law of motion
Action-reaction pairs |
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Definition
When one object exerts a force on a second object, the second one exerts a force on the first that is equal in size and opposite in direction
(For every action there is an equal and opposite reaction)
These forces exists in opposing pairs called ____ |
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Definition
The property a moving object has because of mass and velocity |
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Definition
Formula for calculating momentum |
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Law of Conservation of Momentum |
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Definition
States that the total amount of momentum of a group of objects does not change unless an outside force acts on the objects |
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Slow down
Speed up
Change direction |
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Definition
What are three ways in which the velocity of an object can change? |
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Definition
A horizontal line on a distance-time graph indicates that an object is _____. |
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True
(There is no speed less than 0 m/s) |
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Definition
Speed (distance-time) graphs cannot have a negative slope. |
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Definition
The ________ line on a velocity-time graph indicates no acceleration (or that the object is traveling in the same direction at a constant speed) |
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A velocity-time graph will indicate a positive acceleration with a _______________. |
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A velocity-time graph would indicate a negative acceleration with a _______ ______. |
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Definition
Term that refers to the sum of all the forces acting on an object |
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