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一、压力和压强【知识要点】 1.垂直压在物体表面上的力叫做压力,压力不都是由重力产生的,也不一定都与重力的方向相同.压力的方向总是垂直于支持面指向被压物体.
First, the pressure and pressure 【Knowledge points】 1. Vertical pressure on the surface of the body is called pressure, the pressure is not generated by gravity, and not necessarily the same direction of gravity. The direction of pressure is always perpendicular to the support surface Point to be pressed object.