[试题] 107-1 庞宁宁 力学上 期末考

楼主: TunaVentw (dB9)   2019-01-11 21:18:01
课程名称︰力学上
课程性质︰物理系必带
课程教师︰庞宁宁
开课学院:理学院
开课系所︰物理系
考试日期(年月日)︰2019/01/07
考试时限(分钟):180分钟
是否需发放奖励金:是
(如未明确表示,则不予发放)
试题 :
Mechanics 2019/01/07
1. Show that the geodesic on the surface of a right cylinder is a segment of a
helix. (16%)
2. In an Atwood (the left graph below) machine mass m_1 is hung on the left
side of a fixed massless pulley which rotates without slipping on a massle-
ss string. A mobile pulley of mass m_2 and radius R can move vertically and
also rotate without slipping on the string. Use the Lagrange undertermined
multipliers to calculate the accelerations of m_1 and m_2 and tensions t_1
and t_2. (20%)

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