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frictions
Rolling Friction
between surfaces in motion and one object is a wheel, roller or ball.
Ex. riding a bike, bowling
sliding Friction
When 1 solid surfaces slide to one another
ex: writing, ice skating.
Static Friction
surfaces in contact are at rest
ex; book on table, flower pot on a side walk.
Fluid
object are moving through air water
Arrows are used to represent both
strength and direction
The force formula
Mass X acceleration
the force that always acts in direction opposite to the motion of an object
friction
_is not a force
mass
Jeff pushes a box what causes it to move
an applied force
