kinematics
the study of motions
motion
a change in an object’s locations as measured by a particular observer
distance (d)
the total length of the path travelled by an objects in motion SCALAR QUANTITY
- how far did you go?
direction
the line an object moves along from a particular starting point (north, south, east, west1-
scalar quantity
has magnitude (size) only
vector quantity
has magnitude (size) and also direction (symbol has arrow above it)
position
an object’s location relative to a reference point
displacement
change in position VECTOR QUANTITY
- where are you, relative to where you started?
speed equation
speed = distance/time SCALAR
velocity equation
velocity = displacement/time
uniform motion
when the velocity is constant
how to get displacement from velocity vs time (uniform motion)
displacement = (velocity)(time) [area from line to x-axis]
uniform acceleration
how quickly an objects’ velocity changes over time (rate of change of velocity) [m/s^2]
if the line moves AWAY from x axis…
it is speeding up
if the line moves TOWARDS from x axis…
it is slowing down
if the line is ABOVE the x axis…
it is moving up
if the line is BELOW the x axis…
it is moving down
if the line is AT x…
it remains still/stops