Physics

Problem

A sealed container is completely filled with oil and fitted with two movable pistons

P_1

and

P_2

having areas

20\,\text{cm}^2

and

5\,\text{cm}^2

respectively at different orientations. Both pistons are initially in equilibrium with the outside atmosphere. If an external force of

40\,\text{N}

is applied inward on

P_1

, what minimum force must simultaneously be applied inward on

P_2

so that neither piston moves? a)

5\,\text{N}

10\,\text{N}

20\,\text{N}

40\,\text{N}