摘要
《理论力学教程》是我国各高校目前广泛使用的教材之一，本文对其中的两则例题和一则习题给出学生更易接受的解答．
The text Theoretical-mechanics Course is often used by most of universities and colleges in our country. In this paper the solution to three problems in it. which is easier accepted by students. is worked out.
关键词
轴上的附加压力
转动坐标系
the added pressure on an axis. the rotation frame of axes
