8/22/2019 Physics Y10 Term 2 Exam Paper2

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A & O Centre of Excellence Term 2 Examination 2013

Name : Physics Paper 2 Year 10

ANSWER ALL QUESTIONS [TOTAL 40 MARKS]

1. Two apples with same size and mass, each of these apples are dipped into oil and water

separately. The apples immersed at different levels in the two liquids. The density of the oil is 800 kg

m-3 and the density of water is 1000 kg m-3 .

Figure 3.1 and figure 3.2 illustrate the situation of the apples in the oil and in the water.

(a) What is meant by mass?

.................................................................................................................................................. [1]

(b) Based on Figure 3.1 and Figure 3.2:

(i) Compare the level of the apple in the oil and in the water.

.................................................................................................................................................. [1]

(ii) Compare the volume of liquid displaced by the apple in the oil and in the water

.......................................................................................................................................... [1]

(iii) Compare the density of oil and water.

.................................................................................................................................................. [1]

(c) (i) Relate the volume of liquid displaced to the density of the liquid.

.................................................................................................................................................. [1]

(ii) State the relationship between weight of the apple and the weight of the liquid displaced.

.................................................................................................................................................. [1]

(d) Name the physics principle that explains the situation above.

................................................................................................................................................... [1]

(e) A submarine can sail on the sea surface and under the sea by using the principle stated in (d).

How a submarine at the seabed can float to the surface of the sea?

................................................................................................................................................... [1]

[Total: 8]

FIGURE 1.1 FIGURE 1.2

8/22/2019 Physics Y10 Term 2 Exam Paper2

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2. A fisherman finds that his boat is at different levels in the sea and in the river, although the boat

carries the same load. The density of sea water is 1 025 kg m-3

and of river water is 1 000 kg m-3

.

Figure 1 and 2 illustrate the situation of the boat in the sea and in the river.

(a) What is meant by density?

................................................................................................................................................... [1]

(b) Using Figure 1 and 2,

(i) Compare the level of the boat in the sea water and in the river water.

................................................................................................................................................... [1]

(ii) Compare the volume of water displaced by the boat in the sea and in the river.

................................................................................................................................................... [1]

(iii) Compare the density of sea water and river water.

................................................................................................................................................... [1]

(c)(i) Relate the volume of water displaced to the density of water.................................................................................................................................................... [1]

(ii) Deduce relationship between weight of the boat and the weight of the water displaced.

................................................................................................................................................... [1]

(d) Name the physics principle that explains the situation above.

................................................................................................................................................... [1]

(e) A submarine can sail on the sea surface and under the sea by using the principle stated in

(d). How a submarine on the surface of the sea can submerge?

...................................................................................................................................................

................................................................................................................................................... [1]

[Total: 8]

FIGURE 2.1 FIGURE 2.2

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3. A farmer has two vehicles with the same mass and the same number of wheels.

(a)

Based in the Diagram 3.1 and Diagram 3.2:

(i) Compare the contact area between the wheels in the Diagram 3.1 and Diagram 3.2.

................................................................................................................................................... [2]

(ii) Compare the weight of the vehicle 1 and vehicle 2.

................................................................................................................................................... [2]

(b) Which vehicle should the farmer use when driving across his fields when the ground is very soft?

Give your reasons.

...................................................................................................................................................

................................................................................................................................................... [2]

(c) Name the physics concept involved.

................................................................................................................................................... [1](d) A manufacturer of car wheels estimates that the area of a car wheel in contact with the road

about the same as the area of a persons shoe in contact with the ground. A car weighs 10 000 N and

a driver weighs 500 N

(i) Calculate the ratio pressure of car on ground : pressure of driver on ground. The car has 4 tyres

and a driver has 2 feet) [2]

(ii) Suggest why it might be a good idea to reduce the pressure of the air in car tyres if the car is to

be driven over soft sand.

................................................................................................................................................... [1][Total: 10]

FIGURE 3.1 FIGURE 3.2

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4. Diagram 4.1 shows a horizontal tube AB with both of it ends are closed with rubber stoppers. The

tube is also fixed with three vertical tubes X,Y and Z. Water is then poured into the horizontal tube

AB.

(i) Mark the water level in the vertical tube X,Y and Z in figure 4.1. [1]

(ii) State one physical quantity that affected the water level in the above diagram.

................................................................................................................................................... [1]

(c) A ventury tube AB now is replaced with the ventury tube shown in diagram 4.2. Water flows

uniformly from end A to end B of the tube and it is found that the water level of tube P is at Z.

(Density of water =1000 kgm-3)

(i) Compare the water level in the vertical tube P,Q and R.

................................................................................................................................................... [2]

(ii) Name the principal involve in b(i).

................................................................................................................................................... [1]

(iii) By neglecting atmospheric pressure, calculate the pressure caused by the water column at pointX. [2]

[Total: 7]

FIGURE 4.1 FIGURE 4.2

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5. Figure shows a cyclist is riding along a road at a constant velocity. The total of downward force

acting on the bicycle and the cyclist is 650 N. The normal reaction of the front tyre is 300 N and

forward thrust is 200 N.

(a) Calculate the normal reaction, P acting on the rear tyre. [2]

(b) Give one reason why the total resistance, Q should be 200 N at that moment?

................................................................................................................................................... [1]

(c) What will happen when the forward thrust is increased?

................................................................................................................................................... [1]

(d) Why the cyclist thrown forward when the bicycle runs over a stone?

................................................................................................................................................... [1]

(e) Explain why the cyclist can gets serious injuries if he falls into the road which the surface is very

hard.

................................................................................................................................................... [2]

[Total: 7]