a constant slope on a distance time graph indicates
velocities add by
a moving object does not accelerate if
its velocity remains constant
accelaration is represented by a
how fast a velocity is changing at a specific moment
the force that opposes the motion of objects that touch as they move past each other
static friction is _____ than sliding friction
what force(s) act on a falling object?
gravity and air resistance
in terminal velocity, the net force is
the curved path an object follows
tendency to resist any change in motion
an impelling force or strength
biggest universal force
A force that causes an object to move in a circle
flows and assumes shape of container
as speed increases, pressure decreases
device used to change a force
change in pressure is transmitted equally to all parts of the fluid
apparent loss of weight in an object placed in a fluid
g/cm^3 is the unit for
for work to be done on an object, the object has to ____
force x motion
rate at which work is done
units of power
watt and horsepower
what is a machine?
a device that changes a force
to increase the work output, you must ___________
increase the work input
what is the mechanical advantage of a machine?
number of times the machine increases the input force
what is an inclined plane wrapped around a cylinder
in a first class lever the fulcrum is always between the
effort force and resistance force
the IMA of a third class lever is always
less than one
______ of an object increases when work is done
if the mass of an object doubles, its _______________ doubles
kinetic energy of an object is the direct proportion of its
energey that is stored
equation for potential energy
kinetic energy+potential energy=
_____ is the transfer of thermal energy because of a temperature difference
the transfer of thermal energy with no overall transfer of matter is
the transfer of energy as waves move through space is
the transfer of thermal energy that takes place mostly in fluids is
a material that conducts thermal energy well is called a
the study of the conversion between heat and other forms of energy is called
longitudinal waves have
compressions and rarefactions
transverse waves have
crests and troughs
sound waves are
________ waves vibrate perpendicular
________ waves vibrate parallel
what does amplitude measure?
greatest displacement of a wave from rest position
if two waves collide and form a temporary larger wave, the interference is
in a standing wave, where is there no displacement from rest position?
what standard measure is used to compare sound intensities
the change in frequency of a wave as its source moves in relation to an observer
what kind of waves are electromagnetic
warm objects give off more _________ radiation than cooler objects
what is the speed of light in a vacuum
3 times 10 to the 8th
objects that scatter SOME of the light are
combining equal amounts of the three primary colors of light produce
when is light produced?
when electrons change energy levels in an atom
objects that transmit almost all of the light that it strikes are
what electromagnetic waves have the shortest wavelength?
bending of a ray of light
light of a single wavelength with all the waves lined up
angles of incidence and reflection make rays that are _______________ to a mirror
what is the image that appears to be behind a plane mirror?
when light exits a vacuum and enters another medium, it
what is the speed of light in a material that slows compared to the speed of light in a vacuum
index of refraction
a material that has almost zero resistance at low temperatures is a
potential difference is measured in
a complete path through which charge flows is a
where is magnetic force strongest?
what is the angle between the direction a compass points and geographic north?
materials that can be magnetized
voltage can be induced in a conductor by a changing magnetic field
what converts mechanical energy into electrical energy?
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