A refrigerator magnet weighing 0.14 N is used to hold up a photograph weighing 0.030 N. The magnet attracts the refrigerator door with a magnetic force of 2.10 N.
(a) Identify the interactions between the magnet and other objects.
(b) Draw an FBD for the magnet, showing all the forces that act on it.
(c) Which of these forces are long-range and which are contact forces?
(d) Find the magnitudes of all the forces acting on the magnet.