49 terms

a system for specifying the precise location of objects in space and time

frame of reference

if an object is at rest, its position (does or does not) change with respect to a fixed frame of reference

does not

the change in position of an object

displacement

displacement is a _______ in position

change

displacement formula

displacement (is or is not) always equal to the distance traveled

is not

displacement also includes a description of the _________ of motion

direction

the total displacement divided by the time interval during which the displacement occurred

average velocity

average velocity formula

the average velocity is equal to the ______ _______ needed to cover the given displacement in a given time interval

constant velocity

average speed formula

velocity describes a _______ with both a direction and a numerical value indicating how fast something moves

motion

_______ has no direction, only magnitude

speed

the velocity of an object can be determined if the object's position is known at specific ______ along its path

times

for any position-time graph, average ______ can be determined

velocity

average velocity formula

instantaneous velocity (may or may not) be the same as average velocity

may not

the velocity of an object at some instant or at a specific point in the object's path

instantaneous velocity

the instantaneous velocity at a given time can be determined by ....

measuring the slope of the line that is tangent to that point on the position-versus-time graph

_______ is the rate of change of velocity with respect to time

acceleration

the rate at which velocity changes over time; an object _____(s) if its speed, direction, or both change

acceleration

average acceleration formula

acceleration has dimensions of ...

length

--------

time^2

--------

time^2

the slope and shape of a graph describe the object's _____

motion

as an object's velocity increases, the object travels a ______ distance during each time interval

greater

displacement depends on ... (3 things)

acceleration, initial velocity, time

displacement with constant acceleration formula

displacement = 1/2(initial velocity + final velocity)(time interval)

final velocity depends on ...

initial velocity, acceleration, time, displacement

velocity with constant acceleration formula

Vf = Vi + a(t)

final velocity after any displacement formula

Vf^2 = Vi^2 + 2(a)(x)

free falling bodies undergo _______ acceleration

constant

all objects dropped near the surface of a planet fall with the same ____ _____

constant acceleration

the constant acceleration due to gravitational force (motion is referred to as)

free fall

constant acceleration due to gravity (number)

-9.81 m/s^2 (may be rounded to -10)

acceleration is _____ during upward and downward motion

constant

an object thrown into the air has a _______ acceleration as soon as they are released

downward

in a velocity-versus-time graph a straight, diagonal line indicates...

constant acceleration // increasing velocity

free falling objects always have the same _______ acceleration

downward

when an object is thrown up in the air, it has a ______ velocity and a _____ acceleration

positive - negative

at the top of it's path, an object's velocity has decreased until it is ___

0

when an object begins moving down (after its velocity has reached 0) it has a _____ velocity and ______ acceleration

negative - negative

a negative acceleration and a negative velocity indicate that an object is ______ _____

speeding up

in a velocity-versus-time graph a straight, horizontal line indicates...

constant velocity // no acceleration

in a distance-versus-time graph a straight, diagonal line indicates...

constant velocity

in a distance-versus-time graph a straight, horizontal line indicates...

no velocity // not moving

in a distance-versus-time graph a curved (parabola) line indicates...

increasing velocity

position = where an object is ______

located

distance = how far an object ______

travels

displacement = how far from ______ ______ an object is

original position