String tension

In this approximation the right hand side of the second equation of the set (3.22) is independent of the angle 0, and we can conclude that at any instant the string tension is the weight of the particle ... 

Work must be done in order to overcome the string tension T. 

The same conclusion can be reached from energy considerations, noting that the work done by the string tension as r is reduced is equal to the gain in particle kinetic energy, i.e.,... 

The nonlinearities discussed in Sections 10.1 and 10.1.1 are of a continuous (smooth) nature. That is, the nonlinear addition to spring force, or string tension, is a continuous function of displacement. A more extreme type of nonlinearity—discontinuous nonlinearity—tends to have a more profound effect on the system and spectrum. 

Tension load Caused by the string weight during running in it will be highest at the top joints... 

Toi calculate the design factor for multipart string-ups,. Figures 4-fiS and 4-69 can be tisbd to determine the value of W. W is the-fast line tension and equals the fast line factor - times the hook-load weight indicator. readinjg.- As an example, see. below , ..,. ... 

Calculations for the minimum performance properties of drill pipe are based on formulas given in Appendix A of API RP 7G. It must be remembered that numbers in Tables 4-80-4-83 have been obtained for the uniaxial state of stress, e.g., torsion only or tension only, etc. The tensile stress resistance is decreased when the drill string is subjected to both axial tension and torque a collapse... 

Calculate the maximum value of a rotary torque that may be applied to the drill pipe as specified in Example 5 if the actual working tension load P = 300,000 lb. (For instance, pulling and trying to rotate a differentially stuck drill string.)... 

It should be pointed out that hydrostatic pressure does not produce an effective compression and, therefore, is not considered. If the casing string is suspended at the top of the hole that is filled with fluid, then the only effect of hydrostatic pressure is reduction of casing weight per foot and the string is effectively under tension. 

Part 3. Check casing string on tension obtained in Part 2 and, if necessary, make corrections to satisfy the required magnitude of safety factor. 

Maintain pulley alignment with a strong straightedge tool or, at a minimum, string while tensioning V-belts (Figure 58.8). 

It is well-known, for instance, that if one applies tension at properly timed intervals to pull a stretched wire or string, it begins to oscillate laterally. Lord Rayleigh performed an experiment of this kind by attaching a stretched wire to a prong of a tuning fork when the latter... 

Next we consider the influence of the earth rotation on the motion of the mathematical pendulum. We will proceed from Equation (3.72). As is seen from Fig. 3.5b, the components of the tension S of the string are... 

On a rare occasion a tensioned string tied to pressure switch has been provided as detection over the vapor seal area of a floating roof crude storage tank. Although this method may be considered primitive and cheap, it is effective and beneficial versus the option of no detection). 

The largest uncertainty with using this method to measure densities arises from the surface tension effect between the liquid surface and the wire or string. To circumvent this problem many workers (4) have platinized the wire in the region at which it contacts the liquid surface. Another problem with this method is that it is difficult to control evaporation from the solution being studied. For precise work it is necessary to analyze an alloquot of solution after the density is determined. 

Arrow is a slender shaft with a pointed head used as a missile which is propelled by releasing the tension of the string of a long bow. A bow consists of a strip of wood or other elastic material with a tension cord connecting both end. The bow and arrow constituted one of the earliest weapons. A later development of the long bow was the crossbow, also known as arbalest (qv). Eventually both were replaced by firearms... 

Based on the stresses around the surface of the sphere, determine the tension in the tethering string. 

---