# Positive work done by friction

Can work done by friction be positive? Please explain with an example. Is the work done by friction on a moving car positive?

Work done by force $\mathbf F$ on a material point whose velocity is $\mathbf v$ is, in the time interval $t_1..t_2$
$$\int_{t_1}^{t_2} \mathbf F\cdot\mathbf v\,dt.$$