Studied by 4 people
force
a push or pull of one object on another object, measured in Newtons (N)
acceleration
changing speed of an object
normal force
the force "pushing back" like a table (R or N)
external force
push or pull acting ON an object
gravity
the force Fg about 10.0 m/s2
(Fgrav) is the mass of an object multiplied by a grav.
It is NOT just the acceleration of gravity
at rest
not moving, stopped
in motion
in motion, moving
the system
the object you are observing (the box in the force diagram)
act on
effect, change, push, pull, etc.
Newton's First Law : Inertia
Objects do not change their movement without a force acting on them
Newton's Second Law : F=ma
Newton (N) = kg • m/s2 F=ma force equals mass times acceleration
Newton's Third Law : Equal Reaction
If one object applies a force to a second object, then the second object will apply an equal and opposite force to the first object.
pull
move something towards
push
move something away
Fnet (net force)
total Force (which includes direction!) acting on an object
constant
not changing
Fnorm
Normal force, like a table or the road
Fgrav
Force of gravity (10.0 m/s2 • mass)
Fair
Force of air resistance
Fapp
Applied force, like a finger pushing a ball
Ffrict
the force that causes a moving object to slow down when it is touching another object
magnitude
size of something (shown in FBD by the length of the arrow)
vector
a magnitude with direction (Force is a vector)
contact force
force between objects that are touching (i.e. a push)
at a distance force
force between objects that are NOT touching (i.e. magnetic force)
mass
the amount of matter or stuff of an object (measure in kg, it is the same ANYWHERE!)
weight
the force of gravity on an object (measure in N, it changes depending on what planet you are on)
air resitance
force that is caused by air. The force acts opposite direction to an object moving through air
terminal velocity
the constant speed that a freely falling object reaches when the resistance (of the way which it is falling) stops further acceleration.
intertia
object keeps moving in a direction unless another forces acts on it
free body diagram
drawing that shows the forces acting on an object
balanced forces
object is at rest; total net force=0
unbalanced forces
object is moving; total net force>0
Note 
Flashcard (138)