高三物理的学习中作业多、考试多.如何提高学习效率?答案是注重学习方法.笔者就“比较学习法”谈看法.一、通过比较,注意题目的“不同而同”先看两例:例1如图1所示,摆球的质量为m,摆线长L,若将摆球拉至摆球与水平方向成30°角的P点处,然后由静止开始释放,试计算摆球到达最低点时的速度和摆线中张力的大小. How to improve the efficiency of learning? The answer is to focus on learning methods. The author of “comparative learning method” talk about the views. First, by comparison, pay attention to the subject “different with the same ” first See two examples: Example 1 As shown in Figure 1, the quality of the ball pendulum m, cycloid length L, if the pendulum ball swing to the ball and the horizontal direction at a 30 ° angle P point, and then start to release from rest, Try to calculate the speed at which the ball reaches its lowest point and the amount of tension in the cycloid.