WorksheetsPhysics 9 - Final Assessment Part 1 (Pressure)
Total questions: 30
Worksheet time: 3600secs
When a diver swims down from the surface of the water to a depth of 10 m, the pressure experienced increases from 100 000 N/m2 to 200 000 N/m2 . Which statement explains this increase in pressure?
Water cannot be compressed.
The density of the water increases with depth.
The gravitational field strength increases with depth.
The weight of water above the diver increases with depth.
Tractors have large tyres. These help to prevent the wheels from sinking into soft ground. Which statement explains this?
Larger tyres exert a greater force on the ground.
Larger tyres exert a smaller force on the ground.
Larger tyres exert a greater pressure on the ground.
Larger tyres exert a smaller pressure on the ground.
Why is it easier to push a sharp nail, rather than a blunt nail, into a piece of wood?
The sharp nail exerts a larger force on the wood.
The sharp nail exerts a smaller force on the wood.
The sharp nail exerts a larger pressure on the wood.
.
The sharp nail exerts a smaller pressure on the wood
The water in a swimming pool exerts a pressure at the bottom of the pool. Which graph shows the relationship between the pressure exerted by the water and the depth of water in the pool?
(Assume the density of water is constant.)
A
B
C
D
An object is a depth h below the surface of a liquid. The pressure due to the liquid at this depth is p.
The gravitational field strength is g. What is the density 𝞺 of the liquid?
A woman has a weight of 600 N. She stands on a horizontal floor. The area of her feet in contact with the floor is 0.050 m2. What is the pressure she exerts on the floor?
A
B
C
D
A rectangular marble block has dimensions 1 m by 1 m by 5 m and weighs 125 000N. The marble block is stored with the long side resting on the ground, as in diagram 1.
What is the change in the pressure on the ground due to the block when the block is stored as in diagram 2 rather than diagram 1?
a decrease of 25000 N/m2
an increase of 100 000 N/ m2
an increase of 125 000 N/ m2
no change
A solid cube has sides 0.50 m long and a mass of 120 kg. It stands on the ground on one face. Which pressure does the cube exert on the ground?
480 kg/ m3
960 kg/ m3
4700 N/ m2
9400N/ m2
A dam holds water in a reservoir. The height of the water in the reservoir is 15 m.
The density of water is 1000 kg/ m3 . What is the pressure due to the water at the bottom of the dam?
6.8 Pa
1500 Pa
15 000 Pa
150 000 Pa
The density of sea water is 1030 kg /m3 . The gravitational field strength on the Earth is 9.8N/ kg. Atmospheric pressure is 101 000 Pa. At which depth in sea water is the total pressure due to the atmosphere and the water equal to 513 000 Pa?
40.8 m
50.8 m
400 m
498 m
The graph shows how the pressure due to a liquid varies with the depth beneath the liquid surface.
The gravitational field strength g is 9.8 N/ kg. What is the density of the liquid?
200 kg/ m3
820 kg/ m3
2000 kg/ m3
8200 kg/ m3
The diagram shows three glass containers. All three contain water filled to the same vertical height h. The base area of P is equal to the base area of R. The base area of Q is larger than the other two. Students are asked to compare the water pressure at the bottom of each container
Student 1 says that the pressure at base R is more than the pressure at base P.
Student 2 says that the pressure at base Q is less than the pressure at base P.
Student 3 says that the pressures at all three bases are the same.
Which students are correct?
none is correct
Student 1 only
Student 2 only
Student 3 only
Four containers are filled to the top with the same liquid. The base of each container is circular.
Which container has the greatest pressure exerted by the liquid at its base?
Liquid is stored in a tank. The area of the base of the tank is 2.2 m2 and the pressure at the base due to the liquid is 15 000 Pa.
What is the weight of the liquid?
3300 N
6800 N
15000
33000
The box shown has a weight of 15 N.
The box is resting on a horizontal surface with face P in contact with the surface.
What is the change in pressure on the surface if the box falls over onto face Q?
0.0040 m2/N
0.0067 m2/N
100 N/m2
250 N/ m2
An object is at rest on a horizontal surface. Which equation is used to calculate the pressure that the object exerts?
The diagram shows a deep reservoir formed by a dam.
On what does the pressure at X depend?
the depth of the water at X
the length of the reservoir
the surface area of the water
the thickness of the dam wall
A measuring cylinder of cross-sectional area 4.0 cm2 contains 224 cm3 of liquid.
The pressure of the liquid at the base of the measuring cylinder due to the liquid is 8800 Pa.
What is the density of the liquid? Hint: V = A x h.
224 kg/ m3
385 kg/ m3
1600 kg/ m3
2200 kg/ m3
The diagram shows a tank containing sea water. The density of the sea water is 1020 kg /m3 .
What is the pressure at point P relative to atmospheric pressure?
7400 Pa more than atmospheric pressure
7500 Pa more than atmospheric pressure
75 000 Pa more than atmospheric pressure
82 000 Pa more than atmospheric pressure
A pressure gauge (measuring instrument) is lowered into the sea. Measurements of the pressure and depth are taken as the pressure gauge is lowered.
Which statement describes how and why the pressure changes as the gauge is lowered?
The density of the sea water decreases so the pressure increases.
The temperature of the sea water decreases so the pressure decreases.
The height of the gauge above the sea bed decreases so the pressure decreases.
The depth of the gauge below the surface of the sea increases so the pressure increases.
The diagram shows a rectangular block of weight 16 N.
It is resting on a flat surface.
What is the pressure at the base of the block due to its weight?
0.089 N/cm2
0.36 N/cm2
0.80 N/cm2
320 N/cm2
The diagram shows a solid block resting on a bench. The dimensions of the block are shown.
On which labelled surface should the block rest to produce the smallest pressure on the bench?
P
Q
R
P, Q, and R produce the same pressure.
A pipe full of water connects a water supply on a hill to a tap lower down the hill. The length of the pipe is 500 m. The height of the supply above the tap is 100 m. The density of the water is 1000 kg /m3 .The effect of atmospheric pressure is negligible. What is the water pressure at the tap?
100 000 Pa
500 000 Pa
1 000 000 Pa
5 000 000 Pa
Four submarines are submerged. The density of fresh water is 1000 kg / m3 and the density of sea water is 1020 kg/ m3. Which submarine experiences the greatest pressure due to the water?
The diagrams show three containers, P, Q and R. Each container contains the same liquid. The depth of the liquid is the same in each container.
Which statement about the pressure of the liquid at the bottom of the container is correct?
The pressure of the liquid at the base of P is greatest.
The pressure of the liquid at the base of Q is greatest.
The pressure of the liquid at the base of R is greatest.
The pressures of the liquid at the bases of P, Q and R are the same.
Which diagram shows an athlete exerting the most pressure on the ground (gray shade)?
The diagram shows a stone suspended on a string under the surface of a liquid. The stone experiences a pressure caused by the liquid.
What would increase the pressure on the stone?
increasing the mass of the stone
using a liquid with a lower density
decreasing the surface area of the stone
lowering the stone deeper into the liquid
Row A is correct.
Row B is correct.
Row C is correct.
Row D is correct.
Pressure is related to force and area. Which situation CANNOT be directly explained using this relationship?
Hammering a nail into a piece of wood.
Tractors using wide tyres in a muddy field.
Using a longer spanner than normal to undo a tight nut.
A sharp kitchen knife cutting vegetables more easily than a blunt one.
A tall cylinder is partly filled with two liquids which do not mix. The two liquids have different densities. A student measures the pressure due to the liquids at different depths.
Which graph shows how the liquid pressure varies between positions P and Q?
