A 55 kg bungee jumper leaps from a bridge. She is tied to a bungee cord that is 13 m long when unstretched, and falls a total of 33 m. ▼ Part A Calculate the spring constant k of the bungee cord assuming Hooke's law applies. Express your answer using two significant figures. VG ΑΣΦ k= Submit Part B Calculate the maximum acceleration she experiences. Express your answer using two significant figures. IVE ΑΣΦ 3 Cmax = Submit Request Answer Provide Feedback Request Answer ? ? N/m m/s²

A 55 kg bungee jumper leaps from a bridge. She is tied to a bungee cord that is 13 m long when unstretched, and falls a total of 33 m. ▼ Part A Calculate the spring constant k of the bungee cord assuming Hooke's law applies. Express your answer using two significant figures. VG ΑΣΦ k= Submit Part B Calculate the maximum acceleration she experiences. Express your answer using two significant figures. IVE ΑΣΦ 3 Cmax = Submit Request Answer Provide Feedback Request Answer ? ? N/m m/s²

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter7: Work And Kinetic Energy

Section: Chapter Questions

Problem 39P: A bungee cord is essentially a very long rubber band that can stretch up to four times its...

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A bungee cord is essentially a very long rubber band that can stretch up to four times its unstretched length. However, its spring constant vanes over its stretch [see Menz, P.G. “The Physics of Bungee Jumping.” The Physics Teacher (November 1993) 31: 483-487]. Take the length of the cord to be along the direction and define the stretch as the length of the cord minus its un-stretched length that is, (see below). Suppose a particular bungee cord has a spring constant, for of and for. (Recall that the of (Recall that the spring constant is the slope of the force versus its stretch (a) What is the tension in the cord when the stretch is 16.7 m (the maximum desired for a given jump)? (b) How much work must be done against the elastic force of the bungee cord to stretch It 16.7 m? Figure 7.16 (credit modification of work by Graeme Churchard)
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