  We calculate the force and impulse operators for a charged particle in the
field of an Aharonov-Bohm flux line. The force operator is formally the Lorentz
force, with the magnetic field operator modified to include quantum corrections
due to anomolous commutation relations. Expectation values for stationary
states are calculated. Nonstationary states are treated by integrating the
force operator in time to obtain the impulse operator. Expectation values of
the impulse are calculated for slow wavepackets (which spread faster than they
move) and for fast wavepackets (which spread only negligibly before their
closest approach to the flux line). We give two derivations of the force and
impulse operators, the first a simple derivation based on formal arguments, and
the second a rigorous calculation of wavepacket expectation values. We also
show that the same expressions for the force and impulse are obtained if the
flux line is enclosed in an impenetrable cylinder,or distributed uniformly over
a flux cylinder, in the limit that the radius of the cylinder goes to zero.
