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The basic formula for pressure is F/A (Force per unit area). Unit of pressure is Pascals (Pa).
A force has strength which is known as magnitude as well as direction. The magnitude of the applied force can be large, small or it can also be equal. The force can be applied in the same or opposite direction to each other. These change the effect of the force on the object.
The relationship between pressure, force, and area is given by P = F A . The SI unit of force is N or kg m/s , while the SI unit of area is m . Thus, the SI unit of pressure N m 2 , also known as the pascal (Pa).
The atmospheric pressure at a point is defined as the force acting normally on a unit area around that point, due to the total height of the air column of the atmosphere above it. That pressure is known as atmospheric pressure, also known as air pressure.
A force is the change of state of an object due to external surroundings. Due to forces, an object will either be in a state of motion or will be resting. For example, consider a football placed on the ground motionless. To move the ball in any direction, you will have to apply some forces on the ball.