why do you think it is necessary to define a separate quantity called pressure?why is defining only force not enough?
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Yes,it is necessary to define the Pressure.Because Pressure and Force both are the different quantities.
Force is only the external effort in the form of push or pull,which 1.produces or tries to produce motion in a body at rest,or 2.stops or tries to stop moving body.
But Pressure is the force acting on a particular area.So,if area is small,we need large pressure for the same force.
Force is only the external effort in the form of push or pull,which 1.produces or tries to produce motion in a body at rest,or 2.stops or tries to stop moving body.
But Pressure is the force acting on a particular area.So,if area is small,we need large pressure for the same force.