A coil of wire is held with its plane horizontal to the earth's surface and a small bar magnet dropped vertically down through it. The magnet will fall with a:

The falling magnet induces a current in the coil. From Lenz's law, the direction of the current is such that its magnetic field opposes the motion of the magnet. The flux linked with the coil will change with passage of the magnet, so the hinderance force will change.