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the starting point you choose to describe the location, or position of an object
reference point
an object's distance and direction away from a reference point
position
3 things that a position must include
distance, direction, reference point
a change in position over time
motion
the difference between the starting point and ending point of an object (a straight line)
displacement
the total length an object has traveled between the starting point and ending point (doesn't have to be a straight line)
distance
When are distance and displacement equal?
when motion is in a straight line
is speed a scalar or vector quantity
scalar (only magnitude)
is velocity a scalar or vector quantity
scalar (magnitude and direction)
distance / time - What is this a formula for?
speed
change in velocity over time (velocity / time)
acceleration
When an object slows down, is it accelerating?
Yes, because velocity is changing.
When an object changes direction, is it accelerating?
Yes, because velocity (which includes direction) is changing
m/s is the unit for
speed or velocity
m/s/s is the unit for what?
acceleration
a push or pull on an object
force
