An angler hangs a 4.50-kg fish from a vertical steel wire 1.50 m long and 5.00 X 10-3 cm2 in cross-sectional area. The upper end of the wire is securely fastened to a support.
(a) Calculate the amount the wire is stretched by the hanging fish. The angler now applies a force F to the fish, pulling it very slowly downward by 0.500 mm from its equilibrium position. For this downward motion, calculate
(b) The work done by gravity;
(c) The work done by the force F;
(d) The walk done by the force the wire exerts on the fish; and
(e) The change in the elastic potential energy (the potential energy associated with the tensile stress in the wire). Compare the answers in parts (d) and (e).