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Newton's Laws of Motion
vocabulary
12
Science
7th Grade
04/03/2015

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Term
Displacement
Definition
The distance and direction between starting and ending positions.
Term
Speed
Definition
The distance traveled divided by the time needed to travel the distance.
Term
Velocity
Definition
The displacement divided by time.
Term
Acceleration
Definition
The change in velocity divided by the amount of time required for the change to occur.
Term
Force
Definition
A push or pull.
Term
Newton's first law of motion
Definition
An object will remain at rest or move in a straight line with constant speed unless it is acted upon by a force.
Term
Balanced forces
Definition
Forces in equal and opposite directions that cancel each other out.
Term
Unbalanced forces
Definition
Forces acting on an object do not cancel each other out.
Term
Newton's second law of motion
Definition
An object acted on by an unbalanced force will accelerate in the direction of the net force.
Term
Gravitational force
Definition
Depends on the masses of the objects and the distance between them.
Term
Friction
Definition
A force that resists sliding motion between surfaces that are touching.
Term
Newton's third law of motion
Definition
Forces always act in equal but opposite pairs.
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