PPT Slide
The displacement is how far and in what direction
something has moved compared to where it started
The 2 and 1 subscripts represent “final” and “initial” points.
The Greek delta above is often read as “the change in” -- you
The displacement is actually a vector.
Since we are in one dimension, the sign
of the displacement tells us the direction it points
If we start and end at the same point, no matter what path
we took, the displacement is zero