要使学生能够灵活地运用公式来解决实际问题或计算有关问题必须引导学生深刻领会公式的物理意义，弄清公式的适用条件和使用范围。切实掌握好应用公式解题时应注意的问题。%To make students flexibly use the formula to solve practical problems or calculate the related problems, we must guide the student to understand the physical meaning of the formula, find the suitable conditions and the using range of formula, grasp the problems should be paid attention to when using the formula to solve the problems.
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