Question 1
Figure 1 shows a pool full of water.
The pressure on the ground due to the water in the pool is 3500 Pa.
The gravitational field strength, g, = 10 N / kg.
Calculate the depth of the water in the pool.
(2)
Figure 2 shows part of the side and base of the pool.
Figure 2
The water in the pool causes a force on the base of the pool.
Draw an arrow on Figure 2 to show the direction of this force at point X.
(1)
A smaller pool has the same depth of water but has only half the area in contact with the ground.
The pressure on the ground underneath the smaller pool is
(1)
A small hole is made in the base of the large pool shown in Figure 1.
The area of the hole is 1.5 mm2. The pressure at the base of the pool due to the water is 3500 Pa.
Calculate the force on the ground directly below the hole due to the water in the pool.
Use the equation
(2)
A bigger hole is made in the base of the same pool.
Compare the force on the ground directly below the bigger hole with the force on the ground directly below the original hole.
(1)