Difference Between Force and Pressure

There can be a major difference between force and pressure, even though both are physics entities. In order to understand the difference, we need to understand the definition and its application. Force is the push and pull action resulting in the change of motion and direction whereas pressure is the physical force per unit area.

Difference Between Force and Pressure

Force is the effect caused by the interaction of two objects which tries to change the state of the object. Pressure is the force acting on object in perpendicular direction to the surface of the object which results in spreading of force over a certain area. This could be similar to the difference between stress and pressure. Therefore, if force is applied over a large area, then pressure is said to be low and if the same force is applied to a small area then the resulting pressure is said to be high.

Difference Between Force and Pressure

Force

Pressure

The push and pull action resulting in acceleration of the object

Force acting upon a certain area and acted upon something perpendicular to its surface

Its unit is Newton and is represented by N

Its unit is Pascal and is represented as Pa

The instrument to measure force is called as dynamometer

It instrument to measure pressure is called as manometer

Force is a vector quantity which means it also has direction

Pressure is a scalar quantity which means it does not have direction

Force can be acted upon on the face, edges, side or vertices of the object

Pressure only acts on the surface or face of the object

Velocity of object can be changed with the application of force in one direction

Pressure on the object won’t change the direction of the object.

These were some difference between Force and Pressure. If you wish to find out more, download BYJU’S The Learning App.

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Consider the situation shown in figure. Initially the spring is unstretched when the system is released from rest. Assuming no friction in the pulley, find the maximum elongation of the spring?