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MOTION
WORK
&
POWER
SIMPLE
MACHINES
WAVES
ENERGY
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Describes the distance an object moves in a
certain time period.
SPEED
The product of an object’s mass and it’s
speed (velocity).
MOMENTUM
An object at rest remains at rest and an object in
motion remains in motion unless acted upon by an
unbalanced force. (Newton’s ___ Law)
NEWTON’S
st
1
LAW
A change in an object’s speed or velocity over
time.
ACCELELERATION
Force acting on an object is equal to (the mass
of the object) x (it’s acceleration).
(Newton’s ___ Law)
NEWTON’S 2nd LAW
The SI unit for power.
WATT
Rate at which work is done.
POWER
Applying a force to an object and causing that
object to move a specific distance.
WORK
SI unit of work.
JOULE
Force that opposes the motion of two objects
that are touching.
FRICTION
Device that makes work easier.
SIMPLE MACHINE
Simple machine that is a sloped or slanted
surface.
INCLINED PLANE
Work applied by you to a machine.
INPUT WORK
A simple machine that consists of a rigid bar
that pivots on a fixed point called a fulcrum.
LEVER
Number that indicates how many times a
machine multiplies a force.
MECHANICAL ADVANTAGE
A disturbance that transfers energy from one
place to another.
WAVE
Distance from the midpoint of the wave to
either a crest or trough.
AMPLITUDE
Describes the direction in which a wave
oscillates or vibrates.
POLARIZATION
The angle at which any wave strikes a reflecting
surface is equal to the angle at which the wave is
reflected.
(Law of ____________)
LAW OF REFLECTION
The bending of a wave as the wave passes between
two materials in which the speed of the wave differs
REFRACTION
A measure of the average kinetic energy of the
particles in a substance.
TEMPERATURE
Heat transfer by direct contact of objects.
CONDUCTION
Energy cannot be created or destroyed, but
can be converted from one form to another.
(Law of ___________)
LAW OF CONSERVATION OF
ENERGY
Energy of an object based on it’s position or
composition .
GRAVITATIONAL POTENTIAL
ENERGY
The amount of energy needed to raise the
temperature of 1 gram of a material by 10C.
SPECIFIC HEAT