The difference between gravity and pressure is mainly as follows.
1 Gravity and pressure are forces of different properties.
1.1 Gravity is the force generated by the object being attracted by the earth;
1.2 Pressure is the elastic force generated by the interaction between the object and the support object, causing the object to deform and causing it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause it to cause
2 The direction of gravity and pressure is different.
2.1 The direction of gravity is always vertically downward, perpendicular to the horizontal plane;
2.2 The direction of pressure points to the object being pressed, and is always perpendicular to the contact plane. Only in special cases, such as objects placed on a horizontal plane, will the pressure direction be the same as the gravity direction.
3 The gravity and pressure are also not equal.
3.1 As shown in Figure a, the pressure of the object under the inclined surface is mgcosθ, the direction is perpendicular to the inclined surface, the object is subjected to gravity mg, and the direction is vertically down;
3.2 As shown in Figure b, the pressure of the object is F, the direction is horizontally to the right, the object is subjected to gravity mg, and the direction is vertically down;
3.3 As shown in Figure c, the pressure of the object to the ceiling is F- mg, and the direction is vertically up.
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