1 dr F δ M θ O F θ ' F L O θ d r d 2011-10-12 9 理论力学 F θ s o R r 4-1 力的功 •纯滚动(rolling without slipping): 圆盘相对地面无滑动，与地面 接触点速度为零。 s F o R 问题: 如何求纯滚动圆盘轮心移动S 距离时, 力F 所作的功。
Calculateandcompare The Times taken to reachthebottomif the cylinderrollswithoutslippingas opposed to the case in which the cylinder slips all the way down the planewithout rolling.