+## Kinematics
+
+$${dV \over dt} = {\operatorname{change in volume} \over \operatorname{respect to time}}$$
+
+` |->--diff-->--| |-->--diff-->--|
+displacement velocity acceleration
+ |--<-antidiff-<---| |--<-antidiff-<-|`
+
+**displacement $x$** - change in position
+**velocity $v$** - change in displacement
+**acceleration $a$** - change in velocity
+
+$$v_{\operatorname{avg}}={\Delta x \over \Delta t}={{x_2 - x_1} \over {t_2 - t_1}}$$
+$$\operatorname{speed}_{\operatorname{avg}}={\Delta v \over \Delta t}$$