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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pressure is actually momentum tranferred per second per unit area or simply force per unit area and it is a scalar quantity.while force is a vector quantity so it is necessary to define these physical quantities separately.
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Answer:It is necessary to define pressure as a separate quantity in order to evaluate the force acting on a surface. To measure and describe the effect of a force acting on a surface, we need both the amount of force applied and the area over which it is applied. So, only force is not enough for this purpose. We need a quantity that includes both the above things, and this quantity is pressure, which is defined as the force exerted per unit area.
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