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解题时,除了重视题目中的明显条件外,还应认真挖掘题中的隐含条件,这是解题关键.现就1994年全国各省市中考物理试题为例,来说明这个问题。[例1](贵阳)质量为100千克的物体在起重机的钢绳作用下,以5米/秒的速度匀速上升.这时钢绳的拉力为__牛。隐含条件:物体静止或匀速直线运动暗示物体受到平衡力作用。[例2](成都)在水平桌面上竖直放着
When solving a problem, in addition to paying attention to the obvious conditions in the topic, it is also necessary to carefully explore the hidden conditions in the questions. This is the key to problem solving. Now we will illustrate this issue by taking the physics examination papers for all provinces and cities in 1994 as an example. [Example 1] (Guiyang) A mass with a mass of 100 kg was lifted at a uniform speed of 5 m/s under the action of a steel wire rope of a crane. At this time, the pulling force of the steel wire was _____. Implied condition: Static or uniform linear motion of the object implies that the object is under balance. [Case 2] (Chengdu) Stands Vertically on a Horizontal Desktop