A discussion about the acceleration strange point in some questions of soft and thin cords' movement

LU Jun-ling; QIN Lian-hua; REN Nai-jing

doi:10.16854/j.cnki.1000-0712.2016.0172

College Physics >

2016 , Vol. 35 >Issue 12: 7 - 12

DOI: https://doi.org/10.16854/j.cnki.1000-0712.2016.0172

A discussion about the acceleration strange point in some questions of soft and thin cords' movement

LU Jun-ling ,
QIN Lian-hua ,
REN Nai-jing

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Department of Physics，Tsinghua University，Beijing 100084，China

Online published: 2016-12-20

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Abstract

Questions involving soft and thin cords’movement are a kind of model of college physics. A soft and thin cord is an ideal model for the actual one，which makes the acceleration be infinite at some point of the soft and thin cord. This is the acceleration strange point. If the acceleration strange point is neglected，some mistakes may arise. A discussion is given here by an example of a soft and thin cord.

Key words： physics model; acceleration strange point; soft and thin cord; center of mass

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LU Jun-ling , QIN Lian-hua , REN Nai-jing . A discussion about the acceleration strange point in some questions of soft and thin cords' movement[J]. College Physics, 2016 , 35(12) : 7 -12 . DOI: 10.16854/j.cnki.1000-0712.2016.0172

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