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初中物理学习中,所接触到的物体大多处于平衡或接近平衡状态.如果一个所受的力是平衡力,那么它所受力的合力一定为零.用平衡法解决物体受力问题是解决力学问题的基本方法.根据物体受力平衡情况找出它们之间的等量关系是解题的关键.例1在实验室中,怎样测出木块在水平木板上运动时所受到的摩擦力?
Middle school physics study, most of the objects in contact with the equilibrium or near equilibrium.If a force is balance, then its force together must be zero.With the balance method to solve the object force problem is to solve mechanics The basic method of the problem.According to the equilibrium situation of the object to find the equal relationship between them is the key to solve the problem.Example 1 In the laboratory, how to measure the friction of the wood when moving on horizontal plank?