Technical Sciences Paper 1 (English)

November 2023 — Grade 12 / Matric — Technical Sciences

Past Paper 2023 Grade 12 English

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🎯 150 marks ❓ 12 questions ⏱️ 3h 📄 6 pages 📝 75 items found 📚 1 topics

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2.1and

Q2— Section header —

Q1— Section header —

1.10\in the ANSWER BOOK, e.g. 1.11 D.

1.1A girl is standing on a floor and push es against a wall Which ONE of the following statement

1.2In the verification of Newton s Second Law of Motion the graphs of force

1.3The graph below shows how the moment um of a motorcycle changes with time. Wh ich ONE of the following represents the magnitude of

1.4Choose the CORRECT answer: Both work and energy have agnitude direction

1.5The fluid pressure at a given depth depends upon the total volume or mass of t he liquid. density and mass of the

1.8Which ONE of the following statements is CORRECT about the relationship between the wavelength of a light wave and the energy of its photons?

1.10A transformer is defined as a device that converts electrical energy into mechanical energy. is used to step up or step down the voltage.

Q2— Section header —

2.1Draw a labelled free body diagram indicating ALL the forces acting on the 220 kg block while it is accelerating. (5\

2.2State Newton s Second Law of Motion in words. (2\

2.3Calculate the magnitude of the tension in the string (4

2.4Calculate the coefficient of kinetic friction, of the 75 kg block (7\ 2. How will the magnitude of the

2.5

Q3— Section header —

3.1Grade 12 learners are investigating the principle of conservation of linear momentum for an isolated system. Two trolleys, and , with masses 2m and

3.1.1State the principle of conservation of linear momentum in words. (2\

3.1.2Calculate the average speeds of trolleys and respectively, after the release of the spring. (5\

3.1.3Calculate the total momentum after the release of the spring. (3\

3.1.4Is the total momentum conserved or not? Write only CONSERVED or NOT CONSERVED. Explain the answer. (2\ 3. A basketball, of mass 600 g, hits the floor with a speed of 15 m

3.2.1Define the term impulse (2\

3.2.2Calculate the net force experienced by the ball.

3.3Name THREE safety features in modern cars that make injuries less severe during collisions. (3\ [22] 15 m22

Q4— Section header —

4.1Define the term work (2\

4.2Calculate the work done by the crane in lifting the object (3\

4.3The object was moving at a constant velocity of 25 m as it was lift ed up

4.4.1 State the principle of conservation of mechanical energy in words. (2\

4.4.2How would the total mechanical energy of the object at 50 m above the ground compare to its mechanical energy on the ground? Write only GREATER THAN SMALLER THAN or REMAINS THE SAME

4.4Give a reason

Q4— Section header —

4.4.4Calculate the velocity the object when it hits the ground.

5.1The diagrams below show a h ydraulic press that is used to press a work piece. An ou tput force of

5.1.1Calculate the o utput force of this hydraulic system. (4\

5.1.2Will the output force be sufficient to press the work piece flat? Write only YES or NO. Explain the answer. (2\

5.2A force, , of 4 kN is applied to a 200 mm long round bar, with a diameter of 30 mm. This changes the length of the round bar to 188 mm.

5.2.1Define the term stress (2\ Calculate

5.2.2Stress experienced by the bar (4\

5.2.3Strain in the bar (3\

5.2.4Young s modulus of elasticity (3\

5.3Write down ONE disadvantage of using monograde oil in modern cars (2\ [20 200 mm

Q6— Section header —

6.1The diagram below represents an object and its image that is formed on a flat mirror. 6.

1.1Write down the name of the physical phenomenon that is illustrated in the diagram above (1\ .1.2 hat is the relationship between angles

6.2A man is sitting in a boat and sees a treasure box under the water. The position of the box appears to be higher up than where it actua ly is.

6.2.1Write down TWO changes that occur to the light ray at the water air interface. (2\

6.2.2

6.2.3Illustrate the answer to

Q6— Section header —

Q7— Section header —

7.1The diagram below show one type of electromagnetic radiation that is used to kill cancer cells and remove tumours.

7.1.1Identify the type of electromagnetic radiation that is used in the diagram above. (1\

7.1.2Write down ONE property of this type of electromagnetic radiation that makes it suitable for use in hospitals to kill cancer cells. (1

7.1.3

7.2.1 Write down the TYPE of lenses and (1\

7.2.2 What type of image is formed at point Write

7.2.3Explain th e answer to

Q7— Section header —

7.3Write down ONE other practical application of this type of lens. (1\ [1 Object

Q8— Section header —

8.1Calculate the p otential difference across the plates (5

8.2Give THREE examples of the use of capacitor s in technology (3\ [8

Q9— Section header —

9.1The electric welding machine is specified 5,3 kW , 220 V Fully explain

9.2This electric welding machine is now operated at a voltage of 218,11 V. Use the information in the table above to calculate the following

9.2.1Resistance of the electric welding machine (3\

9.2.2nergy that would be dissipated if the machine is used for a period of 30 minutes (3\

9.2.3Cost of operating the machine for 30 mi nutes if the unit price is R0 75 per kWh (3\

Q10— Section header —

10.2(1\ 10 dia ram

10.4.1Explain why this is step up transformer (2\

10.4.2Calculate the value of the secondary voltage. (3\ [9] TOTAL: 150 Primary coil Secondary coil9

Topics Identified

Leadership

Mark Allocation

Total150 marks

Sections20 + 22 + 19 + 11 + 9 = 81 marks

Paper information

SubjectTechnical Sciences

Year2023

SessionNovember

TypePast Paper

PaperPaper 1

LanguageEnglish

Pages19

Downloads7

Examination context

Decade2020s

Years ago3y

SeasonSpring (SH)

Start daySunday

Exam periodNovember 2023

Days since exam1,086

About Technical Sciences examination preparation

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