What is pressure? What is the relation of pressure with area on which it is applied?
The Force exerted on a surface per unit area is called pressure.
Pressure = Force /Area
Pressure is inversely proportional to the area on which it is applied.
That is, when the area is increased the pressure exerted by applying a force is less.
Why is the tip of a sewing needle made sharp?
Give two examples to show that air exerts pressure.
Is the pressure exerted on ground more when a person is walking than when he is standing? Why?
Air is thrown on a sail attached to a boat from an electric fan placed on the boat. Will the boat start moving?
