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Chapter 3
Motion
15
Physics
9th Grade
10/18/2011

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Cards

Term
Force
Definition
Push and pull (vector)
Term
Inertia
Definition
Tendency of an object to resist any change in it's motion (not a force)
Term
Newton's 1st law of motion
Definition
An object in motion will remain in motion. An object at rest will remain at rest.
Term
Newton's 2nd law of motion
Definition
Force = mass x acceleration

F = ma
Term
Net force
Definition
Sum of all forces on an object
Term
Newton (N)
Definition
Unit of force
Term
Newton's 3rd law of motion
Definition
For every action there is an equal an opposite reaction
Term
Gravity
Definition
Attractive force between any two objects
Term
Friction
Definition
A contact force between two surfaces
Term
Static friction
Definition
Not moving
Term
Kinetic friction
Definition
Moving
Term
Air resistance
Definition
Force that resists motion when objects move through air
Term
Centripetal force
Definition
Cause objects to move in circles
Term
Momentum
Definition
Property of an object related to mass and velocity
Term
Momentum formula
Definition
P = mv

Momentum = mass x velocity
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