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“压力与压强”这一内容既是力学中的重要内容,又是初中物理教学的重点和难点之一。不过在教学过程中,笔者发现,学生对“压力和压强”这一内容的掌握和运用情况不尽如人意。为了以学生为主体,激发他们的学习兴趣,让他们灵活运用“压力与压强”的相关知识解决实际问题,笔者结合教学实践,探讨“压力与压强”这一内容的实际运用。一、明确概念压力,即垂直作用在物体表面上的力,它的方向总指向受力物并与受力物垂直(F=PS)。压强,即
“Pressure and pressure ” This content is not only an important part of mechanics, but also one of the key and difficult points of junior high school physics teaching. However, in the process of teaching, I found that students’ understanding and application of “pressure and pressure ” is not satisfactory. In order to take students as the main body, to stimulate their interest in learning, so that they can flexibly use the relevant knowledge of “pressure and pressure” to solve practical problems, the author combined with the teaching practice to explore “pressure and pressure ” the actual use of this content. First, the concept of a clear pressure, that is, the vertical force on the surface of the object, its direction is always directed force and perpendicular to the force (F = PS). Pressure, that is