Grafik F vs S

Usaha dapat dicari dengan menghitung luas daerah antara grafik dan sumbu X.

\begin{equation*}
\begin{split}
W_1 & = 2 \:.\: 10 = 20 \text{ J} \\\\
W_2 & = \tfrac{1}{2} \:.\: 2 \:.\: 10 = 10 \text{ J} \\\\
W_3 & = \tfrac{1}{2} \:.\: 2 \:.\: (-6) = -6 \text{ J}
\end{split}
\end{equation*}

Usaha total

\begin{equation*}
\begin{split}
W_{\text{total}} & = W_1 + W_2 + W_3 \\\\
W_{\text{total}} & = 20 + 10 - 6 \\\\
W_{\text{total}} & = 24 \text{ J}
\end{split}
\end{equation*}