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Chapter 1.4~1.5

Forces, Mass and Momentum

Friction The force that two surfaces exert on each other when they rub against each other
Sliding Friction When two solid surfaces slide over each other
Static Friction Between two objects that are not moving
Fluid Friction When a solid object moves through a fluid
Rolling Friction When an object rolls across a surface
Gravity A force that pulls objects toward each other
Mass The measure of the amount of matter in an object
Weight A measure of the force of gravity on an object
Inertia Resistance to change in motion
Momentum The quantity of motion of a moving body, measured as a product of its mass and velocity
Newton's First Law of Motion An object at rest will remain at rest unless acted upon by a nonzero net force. An object in motion at a constant velocity will remain in motion unless acted upon by a nonzero net force
Newton's Second Law of Motion An object's acceleration depends on its mass and the net force acting on it
Newton's Third Law of Motion 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
Created by: Bmacyscience
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