NOTATION 



3 coordinate along the cable 



i length of the cable 



a velocity of propagation of an elastic wave along the 

 cable 



p maximum displacement of the upper end of the cable 



u) impressed circular frequency 



g acceleration of gravity 



A crQ3S-sectional area of the cable 



E modulus of elasticity 



M ma S3 of a;j equivalent body at the lower end of the 

 cable 



T tension at any point along the cable 



T 3tatic tension at the lower end of the cable 



T u static tension at the upper end of the cable 



AT " change in tension 



4 longitudinal displacement along the cable 



p. mass per unit length of the cable 



Q angle between the cable and the horizontal 



lii 



