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# Forces and Motion

### vocabulary

TermDefinition
force a push or a pull
motion the movement of an object
magnetism a force that acts at a distance and cannot be seen
gravity a pull/force that attracts objects to each other
friction a force that opposes motion between two surfaces that are touching
lubricants substances used to reduce friction by making surfaces smoother (like oil, grease, etc.)
position an object's location relative to another object
direction the course or path that an object is moving, can be determined by reading a compass
speed a measure of how fast an object is moving
balanced forces forces that do not change the motion of objects
unbalanced forces forces that change the rate and direction of the motion of objects
rate of motion the speed of an object, how fast or slow an object is moving
Newton's 1st Law of Motion states that an object at rest will stay at rest or an object in motion will stay in motion unless acted on by an outside force
Newton's 2nd Law of Motion states that Force = Mass x Acceleration, the greater the mass of an object is, the more force is needed to accelerate it
Newton's 3rd Law of Motion states that for every action, there is an equal and opposite reaction
distance-time graph used to illustrate the motion of an object (shows distance traveled over time)
mass the amount of matter in an object, affects how much force is needed to accelerate it
Created by: Mrs.Cabell