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1.力的图示用一根带箭头的线段把力的三要素都表示出来的方法叫做力的图示。具体的做法是 :沿力的方向画一根线段 ,线段的起点表示力的作用点 ;线段的长度表示力的大小 ;线段末端的箭头表示力的方向。例 1.如图 1所示的小车静止在水平面上 ,现用与地面成 30°角的 90牛顿的力向
1. The diagram of the force The method of expressing the three elements of force with a line segment with arrows is called the force icon. The specific approach is: draw a line along the direction of the force, the starting point of the line represents the point of force; the length of the line represents the size of the force; the arrow at the end of the line represents the direction of the force. Example 1. The car shown in Fig. 1 is stationary on a horizontal surface, and is now using a force of 90 Newtons at an angle of 30 from the ground.