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physics midterm review
vocab and formulas
46
Physics
8th Grade
12/17/2013

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Cards

Term
momentum formula
Definition
p=m/v
Term
kinetic energy formula
Definition
KE=1/2mv
Term
potential energy
Definition
stored energy
Term
momentum
Definition
a property a moving object has
Term
joule
Definition
the SI unit of energy
Term
elastic potential energy
Definition
energy stored by something that can stretch (like a spring)
Term
chemical potential energy
Definition
energy stored in chemical bonds
Term
gravitational potential energy (GPE)
Definition
energy stored by objects above the earth
Term
GPE formula
Definition
GPE=mgh
Term
factors in GPE
Definition
mass, height, gravity
Term
mechanical energy
Definition
the sum of potential energy and kinetic energy
Term
law of conservation of energy
Definition
energy cannot be created or destroyed, but can be transformed
Term
force
Definition
push or a pull
Term
inertia
Definition
tendancy of an object to resist a change in motion
Term
Newton's 1st law
Definition
an object moving at a constant velocity keeps moving until a force acts upon it
Term
Newton's 2nd law
Definition
acceleration of an object is in the same direction as the net force
Term
Newton's 3rd law
Definition
for every action there is an equal but opposite reaction
Term
friction
Definition
force that opposes movement
Term
static friction
Definition
prevents two surfaces sliding on each other
Term
sliding friction
Definition
microwelds break but form again
Term
rolling friction
Definition
friction that gives wheels something to grab on
Term
air resistance
Definition
air pushes up on things falling down
Term
gravity
Definition
attractive force between 2 objects
Term
force of gravity formula
Definition
f=mg
Term
weight
Definition
gravitational force on an object
Term
weight formula
Definition
w=mg
Term
centripetal acceleration
Definition
acceleration toward the center of a circular path
Term
centripetal force
Definition
net force toward the center of the circular path
Term
gravity on Earth
Definition
9.8
Term
conversions
Definition
move decimal back the numbers of zeros OR multiply or divide
Term
mass
Definition
quantity of matter
Term
density
Definition
mass per unit of volume
Term
converting Celsius to Kelvin
Definition
add 273
Term
converting Kelvin to Celsius
Definition
subtract 273
Term
absolute zero
Definition
0 Kelvin or -273 Celsius
Term
speed
Definition
distance objects travel per unit of time
Term
displacement
Definition
object's position relative to the starting point
Term
distance
Definition
how far an object travels
Term
speed formula
Definition
s=d/t
Term
average speed
Definition
total distance divided by total time
Term
instantaneous speed
Definition
speed at any given time
Term
velocity
Definition
speed and direction
Term
acceleration
Definition
rate of change in velocity
Term
acceleration formula
Definition
a=vf-vi/t
Term
net force
Definition
combination of 2 forces
Term
balanced force
Definition
forces equal in size but opposite in direction
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