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摩擦力问题,既是进行物体受力分析的重点,又是力学计算的难点,而且还是高考的热点.应用数学方法解决物理问题是高考对学生要求的能力之一,现以具体例题对这一考点加以理解,希望对读者有所启示.例一个质量为m的物体放在水平地面上,设物体与地面间的摩擦系数为μ,对物体施以作用力F.问:(1)若F是拉力,则F应沿怎样的方向拉,才能使物
Friction problem is not only the focus of analyzing the force of the object, but also the difficult point of mechanics calculation. It is also a hot spot of the college entrance examination. Applying the mathematical method to solve the physical problem is one of the ability of the college entrance examination for students. Now we take a specific example to this test center. To understand, I hope to inspire the reader. For example, an object with mass m is placed on a level ground. Let the friction coefficient between the object and the ground be μ, and apply force to the object. F. Q: (1) If F is Pull force, then F should be pulled in what direction to make things