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What do you mean by pressure?


Pressure is the force acting on a unit area of a surface.

Mathematically, it is given by

                 Pressure = ForceArea  = FA

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What is gravitational force?


Every object whether large or small, exerts a force on every other object in the universe. This force is known as gravitational force. 

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What are interaction of poles of two magnets?


When two magnets are brought near each other, 

(i) The like poles repel each other, and

(ii) Unlike poles attract each other.

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Name the force due to which every object fall on earth?


The force due to which every object falls on earth is called the force of Gravity. 
Force of gravity is an attractive force. 

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What do you mean by electrostatic force?


The force exerted by a charged body on another charged or uncharged body is known as Electrostatic force.

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