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# Laws of Motion 1

Newton's First Law of Motion an object will remain at rest or move in a straight line with constant speed unless it is acted upon by a force
What is the First Law of Motion called? The law of Inertia
What is a force? a push or pull on an object
balanced force forces are in equal but opposite directions, they will cancel each other out
unbalanced force forces that do not cancel out
Newton's Second Law of Motion an object acted on by an unbalanced force will accelerate in the direction of the force with an acceleration given by Newton's Second Law of Motion equation
gravitational force between two objects depends on the masses of the objects and the distances between them
Friction a force that resists sliding motion between two surfaces that are touching
Static Friction keeps an object at rest from moving on a surface when a force is applied to the object
sliding friciton occurs when two surfaces slide past each other
rolling friction makes a wheel roll forward or backward
air resistance mollecules in air collide with the forward-moving surface of an object, slowing its motion down
Newton's Third Law of Motion forces act in equal but opposite pairs
Created by: lindsey_lu_10