the straight-line distance and direction from one point to another

a scalar quantity that describes the length of a path between two points or locations.

a vector quantity that describes a specific point

• a graph of an object's position during corresponding time intervals
• time data are plotted on the horizontal axis       (x-axis) and position data are plotted on the vertical axis (y-axis)

• quantities that have only a magnitude (do not include direction)

• the direction of a line on a graph, either

        horizontal (zero)

        slanting up (positive)

        slanting down(negative).

• slope is calculated by determining the

      ratio of rise over run.

• travelling in equal displacements in equal time intervals
• neither speeding up, slowing down nor changing direction

• centimeters
• meters ( for formulas)
• kilometers

• describes when an event occurs

• Use the letter t for time
• assign subscript i for the initial time
• assign subscript f for the final time

Example:  Δt= t_f - t_i

Watch for signs (+ and -)

What sign do you use for North, East, up and right?

Watch for signs (+ and -)

What sign do you use for South, West, down and left?

Uniform motion is when objects don't speed up or slow down or change direction.

example: when a vehicle continues to travel down a straight road at exactly 60 km an hour.

1. shows the object's position at given times and allows us to picture the motion
2. used to estimate positions and times that are not given as data  (extrapolation or interpolation)

eg: you can estimate a ball's position at any given time.

What kind of a line is used to represent uniform motion on a position-time graph?

• displacement is equal in equal time intervals       (because objects do not speed up, slow down or change direction)