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

frame of reference

does not

displacement

change

is not

direction

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

average velocity

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

constant velocity

motion

speed

times

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

acceleration

acceleration

length
--------
time^2

motion

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)

constant

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

constant acceleration

free fall

### constant acceleration due to gravity (number)

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

constant

downward

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

constant acceleration // increasing velocity

downward

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

positive - negative

0

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

negative - negative

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

located

travels

### displacement = how far from ______ ______ an object is

original position

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