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# Ryan 8th science

### Chapter 2 Forces

Force a push or a pull
Unbalanced Force net force does not equal zero, causes an object to change motion
Newton the SI unit for the strength of a force
Balanced Force net force of zero, the object's motion does not change
Net Force total of all forces acting on an object
Friction a force caused by two objects rubbing together
Gravity a force that pulls objects toward each other
Free Fall gravity is the only force pulling on a falling object
Newton's 1st Law an object at rest will remain at rest and an object in motion will remain in motion
Newton's 2nd Law acceleration depends on an object's mass and the net force acting on the object
Newton's 3rd Law if one object exerts a force on another object, then the second object exerts a force of equal strength in the opposite direction on the first object
Inertia objects resist a change in motion
Created by: apetosa