Kinematics

The study of how objects move

Direction

The line and object moves along from a particular starting point It can be expressed in degrees on a compass, as compass points (north, south, east, west) or as up, down, left, right, forward, backward

Types of Quantities

Scalar $V$

A quantity that has magnitude (size) only.

Distance

Vector $\vec{V}$

A quantity that has magnitude (size) and also direction.

Displacement

Key Equations

${\vec{V}}_f={\vec{V}}_i+{\vec{a}}_{av}\Delta t$

$\Delta \vec{d}=\Delta t(\frac{{\vec{V}}_f+{\vec{V}}_i}{2})$

$\Delta \vec{d}=V_i\Delta t+\frac{1}{2}{\vec{a}}_{av}\Delta t^2$

$\Delta \vec{d}=V_f\Delta t-\frac{1}{2}{\vec{a}}_{av}\Delta t^2$

${V_f}^2={V_i}^2+2a_{av}\Delta d$

Newton’s Laws

Examples