The cushion on which a pole vaulter lands after their vault is essentially a cushion of air with a normal height of 1.2 m, which is compressed to about 0.20 m when the vaulter comes to rest on it. a) In what time is a jumper who has just crossed the bar at 6.40 m stopped until he comes to a standstill? b) How long would the period be if instead of using an air cushion you would use a 20 cm thick layer of sawdust that compresses to 5.0 cm on impact? c) Discuss qualitatively how the mean forces on the jumper differ for these two landing mats. In other words, which of the mats exerts the lesser force on the jumper and why?
The cushion on which a pole vaulter lands after their vault is essentially a cushion of air with a normal height of 1.2 m, which is compressed to about 0.20 m when the vaulter comes to rest on it. a) In what time is a jumper who has just crossed the bar at 6.40 m stopped until he comes to a standstill? b) How long would the period be if instead of using an air cushion you would use a 20 cm thick layer of sawdust that compresses to 5.0 cm on impact? c) Discuss qualitatively how the mean forces on the jumper differ for these two landing mats. In other words, which of the mats exerts the lesser force on the jumper and why?
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Transcribed Image Text:The cushion on which a pole vaulter lands after their
vault is essentially a cushion of air with a normal height
of 1.2 m, which is compressed to about 0.20 m when the
vaulter comes to rest on it. a) In what time is a jumper
who has just crossed the bar at 6.40 m stopped until he
comes to a standstill? b) How long would the period be if
instead of using an air cushion you would use a 20 cm
thick layer of sawdust that compresses to 5.0 cm on
impact? c) Discuss qualitatively how the mean forces on
the jumper differ for these two landing mats. In other
words, which of the mats exerts the lesser force on the
jumper, and why?
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