Technical Sciences Paper 1 (English)

May-June 2022 — Grade 12 / Matric — Technical Sciences

Past Paper 2022 Grade 12 English

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🎯 150 marks ❓ 12 questions ⏱️ 3h 📄 16 pages 📝 87 items found 📚 2 topics

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2.1and

Q2— Section header —

Q1— Section header —

1.10\in the ANSWER BOOK, e.g. 1.11 D. .1 If an object of mass is at rest, t he following statement is TRUE

1.2Two moving objects are involved in a inelastic one dimensional collision. If

1.3Suppose an engine uses 1 J of energy to lift the weight mg in Diagram

1.4Which ONE of the following statements defines strain in a material? Strain is the ratio between the change in length and the original length. change in diameter and the original length. total length and the original length.

1.5Viscosity low oiling

1.6In the diagram below a spring is attached to ceiling It stretches as a mass piece is attached to the other end of the spring

1.7The pencil in the glass of water looks bent, although it is not. Which property of light is responsible for this observation? Reflection Refraction Diffraction

1.8When a compass is placed near a current carrying conductor , the needle deflects This indicates that

1.9In series circuit which ONE of the following quantities remain

1.10Identify the type of device shown in the diagram below Step up transformer

Q2— Section header —

2.1A car with a weight of 10 000 N is travelling eastwards on a level road , while the engine is applying a force eastwards. The car experiences

2.2A properly adjusted headrest can minimi e or prevent whiplash, an injury on the neck and spine, resulting from the rapid forward acceleration in a rear end collision.

2.3A team of two athletes and , are practising to compete in a canoe race. Athlete

2.3.1State Newton Second Law in words (2\

2.3.2Calculate the acceleration of the canoe. (4\

2.3.3When the canoe rea ches a velocity of 3 m.s , athlete jumps off the canoe to the side.

2.4A car engine of weight 8 500 N is suspe nded from a chain block. A horizontal force of 4

2.4.1 State N ewton First Law of Motion in words.

2.4Use the head to tail method and make a scaled drawing to determine the

4.3Calculate the mass of the engine. (2 [2 /t ension

Q3— Section header —

3.1Two bullets are fired, one from a pistol and the other from a rifle, as shown in the diagram below. Assume that the pistol and the rifle exert the same force on two identical bullets.

3.1.1State Newton Third Law in words. (2\

3.1.2When the shot is fired hich bullet will have the greater change in momentum? W rite down only

3.2The rifle has a mass of 1,2 kg and the bullet a mass of 0 kg. The bullet leaves the rifle at a speed of 330 m.s

3.2.1State the principle of conservation of linear momentum in words.

3.2.2Calculate the velocity at which the rifle recoils ( kicks back when the shot is fired. (5\

3.2.3Distinguish between the concepts elastic and inelastic collisions (4\

3.3A firefighter , with mass 70 kg, jumps from the roof of a building. He hit s the ground at a velocity of 2,5 m.s

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4.1Define gravitational potential energy (2\

4.2Calculate the gravitational potential energy of 6 x 10 kg of water at the top of the waterfall (3\

4.3pendulum is suspended by a string as shown in the diagram below . It is pulled sideways and released. At the highest point of its swing

4.3.1What is the mechanical energy of the pendulum, relative to the floor, when the bob is at its highest point? (4

4.3.2What is the mechanical energy of the pendulum, relative to the floor, when the bob is at its lowest point? (2

4.3What is the speed of the pendulum bob when the bob is at its lowest point? (4 15 25

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5.1A load of 4 0 kN causes a compressive stress of 16 M Pa in a square brass bar. Young s modulus for brass is 90 GPa. The original length of the bar is 300 mm.

5.1.1The length of one side of the square brass bar Give your answer

5.1.2The strain caused by the load (3\

5.1.3The change in length, in millimetres, caused by the load (3\ 300 mm Technical Sciences/P 12 DBE/2022 SC/NSC

5.2A hydraulic system is being used to put machine parts into position during the assembling process of a machine. Specifications of the system: Piston has a diameter of 50 mm and Piston

5.2.1The fluid pressure in the hydraulic system when in equilibrium (4

5.2.2The force, that must be exerted onto Piston with an area of 1,96 x 10

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6.1Define refraction (2\

6.2Name angle (1\

6.3Write down the value of angle

6.4Name the angle marked as 25 (1\

6.5How is the speed of the light ray affected as it moves from the glass block into the air? Write down only INCREASES, DECREASES or NO EFFECT. (1

6.6Name the following rays

6.6.1AB (1

6.6.2BC (1

6.6.3CD (1

6.7Which ONE of the two media, AIR or GLASS is optically denser? Give a reason for the

6.8

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7.1The electromagnetic spectrum consists of seven radiation rays. List any FOUR of the seven rays in no particular order.

7.2rite down the rays that

7.2.1Lead to skin damage when a per son is over exposed to sunlight (1\

7.2.2Are used in night vision devices (1\

7.2.3Can penetrate the human body to gather medical information (1\

7.2.4Have photons with the lowest energy (1\ [8

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8.1A 3 V battery is connected to circuit as shown below.

8.1.1State whether capacitor will charge or discharge according to the diagram. Write down only CHARGE or DISCHARGE. (1\

8.1.2Give a reason for the answer to

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8.2The plates of a parallel plate capacitor are 2,38 mm apart and each has an area of 10,2 cm . Each plate carries a charge of 0,345 C.

8.2.1e capacitance of this capacitor (3\

8.2.2he potential difference between the plates (3\ [8] 3 V Technical Sciences/P8

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9.1A current of 6 A is flowing through an electrical appliance with a potential difference of 220 V.

9.1.1Electrical power can be converted for household and other uses. Name TWO of these conversions/uses of electrical power. (2\

9.1.2Calculate the power dissipated in the electrical appliance. (3\

9.2Two o hmic re istors and

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10.1Study the diagram of the DC motor shown below. Answer the questions that follow.

10.1.1 Define an electric motor (2\

10.1.2 Name ONE characteristic that makes this a DC motor. (1\

10.1State whether the coil will rotate CLOCKWISE or ANTI CLOCKWISE Assume that the coil is observed from point

10.2State the energy conversion that takes place in an AC generator. (2\ 10. A transformer has 1 00 secondary turns

Q2— Section header —

Topics Identified

LeadershipBusiness Plan

Mark Allocation

Total150 marks

Sections20 + 20 + 8 = 48 marks

Paper information

SubjectTechnical Sciences

Year2022

SessionMay-June

TypePast Paper

PaperPaper 1

LanguageEnglish

Pages20

Downloads4

Examination context

Decade2020s

Years ago4y

Season—

Start day—

Exam period—

Days since exam—

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