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# Chapter 10 STACK

### chapter ten vocab

TermDefinition
Force A push or pull
Newton SI unit for the magnitude of a force
Net force Combination of all forces acting on an object.
Unbalanced Force When an object has net force.
Balanced Forces Equal forces acting in opposite directions.
Friction A force that two surfaces exert on each other when they rub against each other.
Static Friction A type of friction that acts on non moving objects.
Sliding Friction Slide over each other
Rolling Friction Rolls across surface.
Gravity Force that pulls object towards e/o
Mass The amount of matter in an object.
Weight Amount of gravity on an object.
Free Fall Force of gravity alone causes an obj to accel.
Air Resistance fluid friction of air acts on an obj falling.
Projectile An obj that is thrown will fall just as fast as obj dropped will hit ground at same time.
Compression squeeze
Tension stretch/pull
Inertia An object's tendency to resist change in motion.
Newton's First Law Objects in motion will stay in motion and objects at rest will stay at rest unless acted upon by an outside force.
Newton's 2nd Law Accel. depends on net force acting on object and object's mass.
Newton's 3rd Law For every action, there is an equal or opposite reaction.
Momentum Mass * Velocity (quantity of motion)
Created by: sgust