Technical Sciences Paper 1 (English)

November 2020 — Grade 12 / Matric — Technical Sciences

Past Paper 2020 Grade 12 English

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🎯 150 marks ❓ 12 questions 📄 3 pages 📝 46 items found 📚 1 topics

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2.1and

Q2— Section header —

Q1— Section header —

1.1An object of mass rests on a flat table. The Earth pulls this object with force mg , which is known as the

1.2A man lift a 60 kg load with a rope at a constant velocity. What is the tension force in the rope?

1.3The raph below represents the relationship between a change in momentum \f an object and change in

1.4John and Thabo watched a car approaching a wall. The car hit the wall while travelling at velocity After a long argument about conservation of the car

1.5Which ONE of the following statements on work is TRUE? Work is done when

1.6The standard unit of pressure is ... ascal newton.

1.7What is understood by the term Young s modulus of elasticity The force required to produce a unit area in a tensile test

1.9Magnetic flux can be defined as the number of magnetic field lines produced by a magnet to a given surface perpendicular

1.10Faraday s law implies that wh en the rate of change of the magnetic flux increases, the induced emf will stay the same.

2.1State Newton First Law of Motion in words. (2\

2.2What is the magnitude of the frictional force experienced by sled? (3\

2.3The combined mass of the boy and the sled is now increased while the force applied by the brother remains constant.

2.3.1Define inertia (2\

2.3.2How will the inertia experienced by the brother be affected? Write only INCREASE, DECREASE or REMAIN CONSTANT Explain your answer. (3\ [10] Technical Sciences/P110

3.1Tom is pushing and Zane is pulling trolley loaded with crushed stone

3.1.1Define tension force and give an example of such a force in the diagram above

3.1.2How will the f rictional force on the trolley be a ffected by Zane applied force? Write only INCREASES,

3.1.3Draw a free body diagram of ALL the forces acting on the trolley and its contents. (5\

3.2If the net force acting on the trolley and its contents is 205 N, calculate the coefficient of kinetic friction between the surface and the trolley (6\ [16]16

4.1An electrician, rushing to an urban area with power outage, drives a truck of mass 350 kg towards the east travelling at 120

4.1.1Define momentum (2\

4.1.2What is the velocity of the truck before the collision in m.s

4.1.3Calculate the initial momentum of the car. (3\

4.2After the collision, the truck continues to move towards the east at 20,3 m.s and the car moves backwards at 5,32 m.s

4.2.1State the principle of conservation of linear momentum in words. (2\

4.2.2Use calculation to det rmine whether the collision was elastic or

4.3The driver of a car with mass of 1 150 kg crashes into a tree with a velocity of 15 m.s

4.3.1What is the relationship between the net force experienced by the car and the contact time during the crash? (2\

4.3.2How does the impulse experienced by the car compare to it change in momentum? Write only SMALLER THAN, GREATER THAN or EQUAL TO.

4.3.3The car is equipped with airbags. Explain, using impulse, how this would reduce the extent of the driver 's injuries

4.3.424

5.1A learner lifts her school bag straight from the ground to a height of 0,9 m above the ground. She applies a force of 25 N to lift the bag. Ignore the effect of air resistance.

5.1.1Calculate the work done by the learner. (3

5.1.2If the mass of the bag is 2 kg, determine the net work done on the bag.

5.2The diagram below represents frictionless track.

Q6— Section header —

6.1ne he following terms

6.2A steel bar experiences a stress of 250 MPa. The modulus of elasticity is 190 GPa. The bar has diameter

6.7A hydraulic system is used to lift a 20 000 N vehicle in a workshop. If the vehicle sits on a piston of area 0,8 m , and a force is applied to another p iston

6.8Define the hrust of a liquid. (2\ [25] Technical Sciences/P1 1225

7.4(7\ 18

9.1.1Labe parts and

9.1.2Identify the type of motor. A transformer has 1 200 turns on the primary coil,

Topics Identified

Leadership

Mark Allocation

Total150 marks

Sections20 + 10 + 16 + 24 + 25 + 9 + 7 = 111 marks

Paper information

SubjectTechnical Sciences

Year2020

SessionNovember

TypePast Paper

PaperPaper 1

LanguageEnglish

Pages15

Downloads2

Examination context

Decade2020s

Years ago6y

SeasonSpring (SH)

Start dayThursday

Exam periodNovember 2020

Days since exam2,180

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