Q2:
A container that is 1.2 m under the
sea, near the shore, is full of water of density kg/m3. The
container is suspended above the sea bed on a pole. The container is 3.5 m in
height. Water can enter and leave the container through three holes in its
walls and one hole in its base, as shown in the diagram. Water pressure is
increased gradually at one of the holes in the walls until the pressure there
is Pa.
Is the pressure greater than, less than, or
equal to Pa?
Is the pressure greater than, less than, or
equal to Pa?
Is the pressure greater than, less than, or
equal to Pa?
Q3:
Water in a container is pushed horizontally by a movable wall of the container, as shown in
the diagram. The movable wall has sides of length
and
. Within
the water in the container is a square metal sheet with sides of length 0.125 m. The sheet is supported by a
pole so that all of its downward-facing surface is in contact with the liquid apart from a
small area that the pole fits through. The water pushes the sheet when the containerโs
movable wall is moved. The force applied to the movable wall is equal to the force applied to
the water by the wall.
What is the magnitude of the force due to the motion of the movable wall that pushes upward
on the downward-facing surface of the metal sheet? Ignore the area of the hole where the
pole passes through the sheet.
What is the magnitude of the force due to the motion of the movable wall that pushes
downward on the upward-facing surface of the metal sheet? Ignore the area of the hole where
the pole passes through the sheet.
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