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# force and motion

### Force and Motion for sixth grade

force A push or a pull
Friction A force that oposes motion between two surfaces producing thermal energy
Gravity The force of attraction between objects that is due to their masses. It can affect the position of an object or the direction of its motion.
Inertia The tendency of all objects to resist any change
Motion When an object changes position in relation to reference point over a period of time.
Net force The force that results from combining all the forces exerted on an object
Newton term or unit used to express force.
Speed he rate at which an object moves; need distance and time to calculate
Velocity The speed of an object in a particular direction.
Work When a force causes an object to move in the direction of the force
Relative motion When you compare one objects motion to another objects motion
Balanced force A net force of zero
Unbalanced force When the net force on an object isn't zero. It produces a change in motion.
Decelerate a decrease in speed
Centripetal force acceleration that occurs in circular motion.
Momentum An object in motion has a hard time slowing down once its in motion.
reference point A fixed point on Earth that can be used to describe a distance or direction.
Created by: vyarbrough