physics semester exam

Terms	Definitions
physics	study of motion and forces
meter	metric unit of distance
scalar quantity	only magnitude
distance	how far you have traveled
component	part of motion
uniform motion	straight line no curves
instantaneous acceleration	speed and direction at any distance
force	any push or pull
contact forces	due to touching
agent	cause of friction
net force	all forces of an object
equilibrium	net forces equal zero
kinetic friction	friction of motion
period	the time needed to repeat
interaction pair	equal and opposite forces
SI	standard unit of measurement
inverse relationship	when one goes up the other comes down
vector quantity	magnitude and direction
displacement	how far from where you started
free fall	only force acting on is gravity
constant acceleration	speeds up or slows down at the same rate
system	collection of objects
acceleration due to gravity	9.8 m/s2
non-contact force	not touching
free body diagram	shows your forces
inertia	an objects ability to resist change
static friction	friction that keeps something stationary
terminal velocity	fastest an object will get due to gravity
amplitude	height of a wave
equilibrant	force that balances everything out
newtons first law	objects in motion will stay in motion until an outside object disturbs it
newtons second law	f=ma
newtons third law	for every action there is an equal and opposite reaction
Ff	friction
Fn	normal
Fsp	spring
Ft	tension
Fthrust	thrust
Fg	weight
4 fundamental forces	gravity, strong nuclear, weak nuclear, electro magnetic

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40 terms