
___________ is the rate at which distance is traveled
speed

______ is speed with direction
velocity

_________speed is speed at any moment
instantaneous

_________ speed is the totale distance divided by total time for a trip
average

___________ is the rate at which velocity changes
acceleration

a __________ has both magnitude and direction
vector

if you walk away from a motion detector, the distancetime graph slopes _______
up

if you walk towards a motion detector, the distancetime graph slopes ________
down

if you stand still, the distancetime graph is ________
flat

if you walk towards the motion detector, the velocity is _________
negative

if you walk away from the motion detector, the velocity is _________
positive

if you stand still, the velocity is _______________
zero

if you walk more quickly, the slope of the graph is _________
steeper

the word __________ means size or amount
magnitude

if you are standing on a moving bus, you are at rest _______ to the bus, but moving ______ to the ground outside
relative

___________ is measured in the unit m/s^{2}
acceleration

a ____________ has magnitude but no direction
scalar

____________ is the stretching force in a string
tension

the sum of two vectors is called the _________
resultant

an object moving in the air only affected by gravity is called a _____________
projectile

a vector can be resolved into two _______________, horizontal and vertical
components

______________ is the force between objects as they slide across each other
friction

__________ is an object's resistance to a change in its motion
inertia

an object's ________ changes as the object moves from the Earth to the moon
weight

an object's ______ doesnt change as it moves from the Earth to the moon
mass

__________ is the unit for force
Newton

__________ is the quantity of matter in an object, it is measured in kilograms
mass

_____ is the force of gravity on an object
weight

the combination of all forces acting on an object is called the _______________
net force

A book sits on the table. The table pushes up on it. The name of this force is the __________ force
normal

__________________ is when the net force on an object is zero
equilibrium

if i push a box to the right, the direction of friction on it is to the ____________
left

___________ is the unit for pressure
pascal

Newton's third law says that when two objects collide, the forces on them are always ___________
equal

A skydiver moves at a constant speed called the ___________ speed when her weight equals the force of air resistance on her
terminal

as a skydiver's speed increases, the force of air resistance on her _________________
increases

______________ is the amount of force per area
pressure

What does Newton's third law say?
For every action, there is an equal and opposite reaction

What does Newton's first law say?
AN object at rest will stay at rest and an object in motion will stay in motion at a constant velocity unless acted on by an outside net force

__________ causes a change in momentum
impulse

an objects ____________ depends on its mass and velocity
momentum

The law of ____________________________ says that the total momentum of two objects before a collision is the same as the total momentum after the collision
conservation of momentum

an ____________ collision occurs when two objects bounce
elastic

an _________________ collision occurs when two objects stick together
inelastic

an ________________ is when two objects start together and end separate
explosion

________ is done when an object is moved by a force
work

______________ is the unit at which work and energy are measured
joules

________ is the rate at which work is done
power

one ________ equals one joule per second
watt

______________ energy is stored energy
potential

if you lift an object, you give it ___________________ potential energy
gravitational

if an object is moving, it has ______ energy
kinetic

the law of ________________________________ states that energy can neither be created or destroyed
conservation of energy

If you hold an object above the ground, it has ___________________ energy. As it falls, it gains ___________ energy and loses _______ energy. The total amount of energy at any point in its fall is ____________.
gravitational potential, kinetic, gravitational potential, constant

A force that acts perpendicular to the motion of an object is called the _____________ force and it makes the object ______________________________________.
centripetal, turn in a circular path

The gravitational force between two objects depends on their ________________ and the ________ between their centers
masses, distance

