(a) One end of a wire of length L and diameter d is attached to a high ceiling. The wire hangs vertically under its own weight. Under these conditions: (i) Calculate the highest stress in the wire (ii) Calculate the elongation of the wire (b) If the wire is now laying horizontally on a smooth surface and attached to a wall at one end, what force must be applied to the other end of the wire for the elongation to be the same as in part (a).
(a) One end of a wire of length L and diameter d is attached to a high ceiling. The wire hangs vertically under its own weight. Under these conditions: (i) Calculate the highest stress in the wire (ii) Calculate the elongation of the wire (b) If the wire is now laying horizontally on a smooth surface and attached to a wall at one end, what force must be applied to the other end of the wire for the elongation to be the same as in part (a).
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(a) One end of a wire of length L and diameter d is attached to a high ceiling. The wire hangs
vertically under its own weight. Under these conditions:
(i) Calculate the highest stress in the wire
(ii) Calculate the elongation of the wire
(b) If the wire is now laying horizontally on a smooth surface and attached to a wall at
one end, what force must be applied to the other end of the wire for the elongation to be the same
as in part (a).
Assume the following properties for the wire: E=14 x 10° psi, d=0.15 in, L=80 ft and specific
weight of y=0.215 lb/in'.
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