Rope mechanics

McKenna, H.A.; Hearle, J. W. S.; O'Hear, N.

doi:10.1533/9781855739932.141

Cited by 3 publications

(3 citation statements)

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“…We have experimentally verified that the tensions at both ends of the nylon rope comply with the capstan equation and the kinetic friction coefficient between the nylon rope and the steel rod is ∼0.13, which is consistent with literature [12]. For the maximum static friction used in the simulation to determine whether the system can switch from stage 2 to stage 1, we here artificially take the measured value of the kinetic friction coefficient as the value of the maximum static friction coefficient.…”

Section: Experimental Descriptionsupporting

confidence: 81%

Theoretical and experimental study of the looping pendulum

Wang

Shi

2021

Eur. J. Phys.

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We investigate the looping pendulum phenomenon proposed by the International Young Physicists’ tournament (IYPT) in 2019 with experiments and theoretical model based on Newtonian mechanics. When using high-speed video to measure the motion of objects, the acceleration measurement error may worsen significantly at a high frame rate due to position uncertainty. This issue is emphasized and can be resolved by additionally using a wireless acceleration sensor. The falling acceleration curves of heavy-load given by our theoretical model are in good agreement with the experimental measurement data. The mass ratio-release angle parameter space for a successful demonstration is given by numerical simulation, showing that a large value of heavy-light mass ratio should be more likely to make a successful demonstration experiment. The experiments reported here are appropriate for junior undergraduates to carry out experimental research.

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Section: Experimental Descriptionsupporting

confidence: 81%

Theoretical and experimental study of the looping pendulum

Wang

Shi

2021

Eur. J. Phys.

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“…(The latter choice is good because of its tensile strength and relative inextensibility.) All of these materials have densities < 1.8 g cm −3 [8]. If we choose a practicable metal for the spherical mass and exclude magnesium, the density ratio in the above inequality will be less than unity.…”

Section: Discussionmentioning

confidence: 99%

Does a physical pendulum ever act like a simple pendulum?

Fulton,

Gay

2024

Eur. J. Phys.

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“…Plait and twisted fibre have been defined as a complex technology using different components (K. Hardy 2008; Hurley 1979; Kenyon 1951; Kvavadze et al 2009; McKenna et al 2004; Small 2002) and even a mathematical comprehension of pairs, groups and numbers (B. Hardy et al 2020). It is the technological basis for making textiles, bags, nets, mats and ropes.…”

Section: Evidence Of Ropes In Prehistorymentioning

confidence: 99%

Hanging over the Void. Uses of Long Ropes and Climbing Rope Ladders in Prehistory as Illustrated in Levantine Rock Art

Bea¹,

Monroig²,

Sanz³

2023

CAJ

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Direct or indirect evidence of ropemaking are scarce in European prehistory. Only a few references to Middle or Upper Palaeolithic remains are known to us, with more examples towards the Holocene. The archaeological contexts of ropes offer little information about possible uses, as the activities they are used for are often archaeologically invisible. However, some rock-art traditions shed some light on potential uses, worth exploring. In Spain, Levantine rock art offers the best graphic examples across Europe showing various uses of ropes, including climbing. Starting from the recently discovered climbing scene of Barranco Gómez site (Teruel, Spain), including the best preserved and more complex use of ropes seen so far in Levantine art, this paper analyses representations of ropes in this art, as well as their varieties and diverse uses. Our study suggests that different rope-making techniques were used by Levantine societies, which we believe are indicative of a complex rope-making technology, requiring a considerable investment of time and efforts. It also shows a certain variety of rope climbing techniques and rope climbing gear, illustrating that both were mastered by Levantine societies. Moreover, a preferential use of ropes in honey-hunting scenes is observed.

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Rope mechanics

Cited by 3 publications

References 0 publications

Theoretical and experimental study of the looping pendulum

Theoretical and experimental study of the looping pendulum

Does a physical pendulum ever act like a simple pendulum?

Hanging over the Void. Uses of Long Ropes and Climbing Rope Ladders in Prehistory as Illustrated in Levantine Rock Art

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