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# Physics

### Lesson 2: Physics Vocabulary Study Stack

TermDefinition
Force The push or pull that can change the motion of an object.
Balanced Forces Separate forces on an object that combined do not change the movement of the object.
Unbalanced Forces Forces on an object that cause change in the motion of the object.
Net Force The sum of all the forces acting on an object.
At Rest The state of an object when it is not in motion.
Motion The change in an objectâ€™s position with respect to time and in comparison to the position of other objects used as reference points.
Speed The rate of change of position (or distance traveled) with respect to time; units in which speed is measured are expressed as distance per time (example: meters per second).
Direction A straight path that an object can move along.
Friction Force that opposes the motion of one surface across another.
Frame of Reference A system that uses axes or background objects to measure the position or movement of an object.
Velocity Measurement of speed and direction of an object.
Acceleration The rate of change in an object's speed.
Created by: XentorphBlue

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