  Molecular dynamics simulations are used to assess the influence of Coulomb
coupling on the energy evolution of charged projectiles in the classical
one-component plasma. The average projectile kinetic energy is found to
decrease linearly with time when $\nu_{\alpha}/\omega_{p} \lesssim 10^{-2}$,
where $\nu_{\alpha }$ is the Coulomb collision frequency between the projectile
and the medium, and $\omega_{p}$ is the plasma frequency. Stopping power is
obtained from the slope of this curve. In comparison to the weakly coupled
limit, strong Coulomb coupling causes the magnitude of the stopping power to
increase, the Bragg peak to shift to several times the plasma thermal speed,
and for the stopping power curve to broaden substantially. The rate of change
of the total projectile kinetic energy averaged over many independent
simulations is shown to consist of two measurable components: a component
associated with a one-dimensional friction force, and a thermal energy exchange
rate. In the limit of a slow and massive projectile, these can be related to
the macroscopic transport rates of self-diffusion and temperature relaxation in
the plasma. Simulation results are compared with available theoretical models
for stopping power, self-diffusion coefficients, and temperature relaxation
rates.
