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# Force & Motion

Ch. 1 Science
Across
Friction that occurs when one solid surface slides over another.
The SI unit of force.
Every action force has an opposite, and equal reaction force.
The force of attraction between all masses in the universe.
The force one object applies to a second.See Newton's Third Law of Motion
Forces that do not cancel each other out when acting together on a single object.
A push or pull that acts on an object.
Friction between non-moving surfaces.
A change in velocity (speed & direction).
The combination of all forces acting on an object.
Down
Friction between two solid surfaces moving over each other.
Force is mass times acceleration; an objects acceleration depends on the mass of the object and the size and direction of the force acting upon it.
Forces that cancel each other out when acting together on a single object.
An object's change in position relative to a reference point.
An object at rest will stay at rest; an object in motion will stay in motion; unless acted by an outside force.
Friction that occurs as an object moves through air.
The force that two surfaces exert on each other when they rub against each other.
The speed and direction of a moving object
The force with which an object responds to an action as in Newton's Third Law of Motion
How fast an object's position is changing with time at any moment.
The tendency of an object to resist a change in its state of motion.