Question

How would preassure change if

:area is doubeled keeping force constant.
:force is doubeled keeping area constant

Answer 1

When the surface area is doubled, keeping the force constant, the pressure will decrease. b] When the force is doubled, keeping the area constant, pressure will increase. So, it is clear that the pressure is inversely proportional to the area.

Answer 2

Answer: Area is doubled keeping force constant:

Pressure is force per area.

If force is constant, pressure is inversely proportional to area. If p1 is initial pressure, p2 is final pressure, A1 is initial area , A2 is final area, then

(p2/p1) = (A1/A2)

P2 = p1×(A1/A2)

A2 = 2 ×A1…. given

p2 = p1 × ( A1/ 2 ×A1) =p1/2

Hence final pressure is half the initial pressure.

Force is doubled keeping area constant:

Since pressure=force/area and we are doubling the force

So pressure will also double.

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