Hi,
the second of Newtons laws is 'force equals the time rate of change of momentum.'
If you wish to reverse the momentum of an object instantaneously that would require infinite force, which is clearly impossible.
The better way to describe the problem is that for a given momentum what force (force being analogous to torque) is required to reverse the momentum
in a given time. Then the only question is how much elapsed time is considered good enough for your application.
If you were to detail things like the momentum, ie mass and speed of the object to be reversed, the mechanical means of converting motor torque to
linear acceleration, say ballscrew, or rack and pinion we might be able to do some calculations that would tell you whether its possible or more prehaps feasible at a cost.
Craig