define pressure and deduce the relation between the pressure force and area of contact
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the combination effect of force and Area on which it acts can be described by a quantity call presure!
And the reslation is...
IPressure is the Force acting on a body per unit area.
The Formula used is P=F/A
Converting the equality to proprtionality, we can conclude that pressure varies directly with Force and varies inversely with Area.
More the force, more the pressure and less the surface area, more the pressure.
Taking an example of Pushing a Thumbnail into a wall
In solids
Think about these two situations:
Pushing a drawing pin into a wall pointy end towards the wall.
Pushing a drawing pin into a wall pointy end towards your thumb.
Two similar activities with two very different results.
The reason for this is the difference in pressure. Assuming the same force is applied, each case would have a different pressure acting on the thumb. In the first diagram the thumb pushes on a large area so the force is spread out and the pressure is low. In the second diagram the force is concentrated on a small area so the pressure is much higher.
If a force is applied over a smaller surface area you get a larger pressure.
In liquids
A car-break system can be taken as an example
In gases
Boyle and Charles law for ideal gases
HOPE IT HELPS!
And the reslation is...
IPressure is the Force acting on a body per unit area.
The Formula used is P=F/A
Converting the equality to proprtionality, we can conclude that pressure varies directly with Force and varies inversely with Area.
More the force, more the pressure and less the surface area, more the pressure.
Taking an example of Pushing a Thumbnail into a wall
In solids
Think about these two situations:
Pushing a drawing pin into a wall pointy end towards the wall.
Pushing a drawing pin into a wall pointy end towards your thumb.
Two similar activities with two very different results.
The reason for this is the difference in pressure. Assuming the same force is applied, each case would have a different pressure acting on the thumb. In the first diagram the thumb pushes on a large area so the force is spread out and the pressure is low. In the second diagram the force is concentrated on a small area so the pressure is much higher.
If a force is applied over a smaller surface area you get a larger pressure.
In liquids
A car-break system can be taken as an example
In gases
Boyle and Charles law for ideal gases
HOPE IT HELPS!
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