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WorksheetsRevision Lesson F4, C2.10 --- C3.4
Total questions: 24
Worksheet time: 48mins
Nicholas pushes a concrete wall in his classroom
with a force of 20 N for 30 minutes.
How much work does he do on the wall?
20 J
10 J
5 J
0 J
Auntie Sarimah mops the floor by using a force of 9N at an angle of 60° to the floor. How much work has she done after mopping a total distance of 4m ?
18 J
180 J
108 J
1.8 J
A spring with a 300g sphere attached to it is extended by 5cm. The force constant of the spring is 200 Nm–1.
What is the elastic potential energy stored in the spring?
0.5 J
10 J
0.25 J
4.22 J
Encik Ali with a mass of 50 kg climbs a coconut tree to a height of 6m to pick a coconut in 1 minute. What is his power?
5W
25W
50W
300W
The efficiency of a device can be increased if
the useful power output is increased while the power input is maintained.
the useful power output is maintained while the power input is increased.
the useful power output and power input are increased.
If you walk on soft snow wearing skis, you are less likely to sink in. This is because
your weight depends on the area of the shoe which is in contact with the ground.
the pressure under your shoe depends on the area of the
shoe which is in contact with the ground.
your mass depends on the area of the shoe which is in contact with the ground.
What is the pressure on a boy’s feet if his mass is 40 kg and the total area of the soles of his shoes is 180 cm2 ?
18.2 kPa
19.1 kPa
19.8 kPa
22.2 kPa
When blood pressure is measured, the cuff of the sphygmomanometer is wrapped round the upper arm and must be held at the level of the heart. Why?
Blood pressure depends on the level of the blood.
Blood pressure is normal when the cuff and heart are at the
same level.
Blood is able to flow easily to the wrist.
The pressure of liquid at the bottom of a jug depends on the following factors except
shape of the jug
depth of liquid
the density of liquid
gravitational field strength
The pressure of sea water at the bottom of the sea is 1.2×108 Nm–2. Determine the depth of the sea.
[Density of sea water = 1020 kgm–3]
1.18×104 m
1.18×105 m
1.18×107 m
1.18×106 m
Diagram 3 shows a U-tube filled with two liquids, X and Y which are immiscible. The heights of the liquid columns of X and Y from level P are 8 cm and 4 cm respectively.
Which of the following statements is true?
The density of X is less than the density of Y.
The liquid pressure is higher in column X than in column Y at level P.
The densities of liquids X and Y are equal.
Diagram shows the design of a dam. Why does the thickness of the dam increase with its depth?
The design of this structure is stronger.
Water pressure increases with depth.
The cost of construction is lower.
Water pressure acts uniformly in all directions.
A fish is at a depth of 50m in the sea. Calculate the total pressure acting on the fish.
[Density of sea water = 1150 kgm–3,
g = 10 Nkg–1,
atmospheric pressure = 105 Nm–2]
3.67×105 Nm–2
4.75×105 Nm–2
6.75×105 Nm–2
9.23×105 Nm–2
Diagram shows a rubber sucker with a hook pressed against a smooth wall and then released. The rubber sucker sticks to the wall because
the atmospheric pressure is more than the pressure inside the sucker.
the atmospheric pressure is less than the pressure inside
the sucker.
the atmospheric pressure is equal to the pressure inside
the sucker.
The height, h will be decreased if
the glass tube is lowered further into the container.
the atmospheric pressure decreases.
the quantity of mercury in the container is decreased.
Diagram shows a barometer is used by Aizan to study the atmospheric pressure at a seaside. The length of h is 76 cm.
What happens to the value of h if Aizan were to bring the barometer to the peak of Gunung Tahan ?
Equal to 0 cm
Equal to 76 cm
Larger than 76 cm
Smaller than 76 cm
If a small amount of air is introduced into the vacuum
space, which of the following changes will occur ?
Height, h increases.
Height, h decreases.
Height, h remains unchanged.
Diagram shows gas X trapped inside a U-tube.
The length of mercury column is 14 cm.
What is the pressure of gas X ?
[ Density of mercury = 13600 kgm-3 ]
1.90 × 103 Pa
1.90 × 105 Pa
1.90 × 104 Pa
1.90 × 106 Pa
Diagram shows a manometer attached to a container containing gas. Which of the following statements is true about pressure of the gas and the atmospheric pressure?
Gas pressure is equal to atmospheric pressure.
Gas pressure is greater than atmospheric pressure.
Gas pressure is less than atmospheric pressure.
Diagram shows a manometer containing mercury of density 1.36 × 104 kgm–3, connected to a gas supply.
Calculate the pressure of the gas. [Gravitational field strength, g = 10 N kg–1, atmospheric pressure = 76 cmHg]
1.1×105 Pa
9.3×105 Pa
1.1×109 Pa
4.7×105 Pa
Diagram shows a hydraulic press. Find the mass of a load, which can be lifted by a force of 10 N.
20 kg
30 kg
50 kg
10 kg
Hydraulic machines are able to use liquid pressure to transfer energy from one place to another because
liquid pressure acts equally in one direction.
liquids are incompressible.
liquids do not have a fixed form.
Figure shows a hydraulic system in equilibrium. Given that the area of the output piston is 5 times the area of the input piston, what is the mass, m needed to balance the load of 20 kg?
6 kg
2 kg
4 kg
8 kg
James squeezes the toothpaste out from a tube as shown below. Which principle explains the situation ?
Archimedes
Bernoulli
Pascal
