  We have investigated the dynamics of particles in the vicinity of a static
spherically symmetric black hole in f(R) gravity. Using the Euler-Lagrange
method the dynamical equations of a neutral particle are obtained. Assuming
that the particle is initially moving in the innermost stable circular orbit,
we have calculated its escape velocity, after a collision with some other
particle. The conditions for the escape of colliding particles are discussed.
The effective potential and the trajectories of the escaping particles are
studied graphically.
