一、压力与重力不同1 .性质不同。压力是垂直压在物体表面上的力 ,它是由于两相互接触的物体相互挤压而产生的。而重力是地面附近的物体由于地球的吸引而使物体受到的力 ,物体与地球可以不接触。2 .大小无直接联系。如图 1所示 ,重为 G的物体 ,放在各种不同的支承面上 ,其中 F First, the pressure and gravity are different 1. The nature is different. Pressure is the force that presses vertically on the surface of an object. It is caused by the mutual pressing of two mutually touching objects. Gravity is the force that the object near the ground receives because of the earth’s attraction. The object and the earth can not touch. 2 . There is no direct contact with the size. As shown in Figure 1, objects weighing G are placed on various supporting surfaces, where F