mrojasclass.weebly.com · Web viewThe combination of all of the forces acting on an object....
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Force
A push or a pull exerted on an object in order to change the motion of the object;
force has size and direction.
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Motion
An object’s change in position relative to a reference point.
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Net Force
The combination of all of the forces acting on an object.
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Balanced Forces
A set of forces exerted on an object that cancel one another out so that there is no overall force on that object; the combined force is the same as zero force; balanced forces will not cause a change in
the motion of an object.
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Unbalanced Forces
A set of forces exerted on an object that change the motion of that object; the combined force has size and
direction; unbalanced forces are needed to make an object start moving, speed up, slow down, or change
direction.
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Newton
The SI unit for force (Symbol, N).
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Acceleration
The rate at which velocity changes over time; and object accelerates if its speed,
direction, or both change.
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Inertia
The tendency of an object to resist being moved or, if the object is moving, to resist a
change in speed or direction.
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Friction
A force that opposes motion between two surfaces that are in contact.