An electromagnet weighing 400 lb and suspended by a spring having a stiffness of 100 lb/in. (Fig. P.2.2a) lifts 200 lb of iron scrap (Fig. P2.2b). Determine the equation describing the motion when the...

Extracted text: An electromagnet weighing 400 lb and suspended by a spring having a stiffness of 100 lb/in. (Fig. P.2.2a) lifts 200 lb of iron scrap (Fig. P2.2b). Determine the equation describing the motion when the electric current is turned off and the scrap is dropped (Fig. P2.2c). 2.2 (a) (b) (c) AN-