I know that when an object has been applied force to, this is called pressure, so if I apply some kind of force to a chair like push it forward or pull it forward that would be pressure, my question is that can there be force without pressure?
Answer
I'm not sure of your definition of pressure. The usual one in physics, given by wikipedia, is the amount of force acting per unit area, perpendicular to the surface.
Whenever you apply a force to something, if the force is distributed on the surface (meaning that the force you are applying can be described by many small forces perpendicular to the surface), you can define a pressure. Concretely, when you push a chair with your finger, the pressure will be something close to the total force you apply to the chair divided by the surface of your finger.
Many forces can't be described with the notion of pressure. For example, the weight is a force which is distributed on the volume of an object so you won't be able to understand this force with pressure.
No comments:
Post a Comment