-` |->--diff-->--| |-->--diff-->--|
-displacement velocity acceleration
- |--<-antidiff-<---| |--<-antidiff-<-|`
-
-**displacement $x$** - change in position
-**velocity $v$** - change in displacement
-**acceleration $a$** - change in velocity
+**position $x$** - distance from origin or fixed point
+**displacement $s$** - change in position from starting point (vector)
+**velocity $v$** - change in position with respect to time
+**acceleration $a$** - change in velocity
+**speed** - magnitude of velocity