Physical Sciences Grade 10 P1 2018 QP (Eng)

NATIONAL SENIOR CERTIFICATE GRADE 10 PHYSICAL SCIENCES: PHYSICS (P1) NOVEMBER 2018 MARKS: 150 TIME: 2 hours This question paper consists of 17 pages, 2 data sheets and 1 answer sheet. Copyright reserved Please turn over

Physical Sciences/P1 2 DBE/November 2018 CAPS – Grade 10 INSTRUCTIONS AND INFORMATION 1. Write your name and class (e.g. 10A) in the appropriate spaces on the ANSWER BOOK. 2. This question paper consists of 11 questions. Answer ALL the questions in the ANSWER BOOK. 3. Hand in the ANSWER SHEET with the ANSWER BOOK. 4. Start EACH question on a NEW page in the ANSWER BOOK. 5. Number the answers correctly according to the numbering system used in this question paper. 6. Leave ONE line between two subquestions, e.g. between QUESTION 2.1 and QUESTION 2.2. 7. You may use a non-programmable calculator. 8. You may use appropriate mathematical instruments. 9. You are advised to use the attached DATA SHEETS. 10. Show ALL formulae and substitutions in ALL calculations. 11. Round off your final numerical answers to a minimum of TWO decimal places. 12. Give brief motivations, discussions, etc. where required. 13. Write neatly and legibly. Copyright reserved Please turn over

Physical Sciences/P1 3 DBE/November 2018 CAPS – Grade 10 QUESTION 1: MULTIPLE-CHOICE QUESTIONS Various options are provided as possible answers to the following questions. Each question has only ONE correct answer. Choose the answer and write only the letter (A–D) next to the question numbers (1.1 to 1.10) in the ANSWER BOOK, e.g. 1.11 D. 1.1 An object is positively charged if it has more … A electrons than protons. B electrons than neutrons. C protons than electrons. D protons than neutrons. (2) 1.2 A car is travelling at a speed of 30 m·s-1 on a straight road. What would be the speed of the car in km∙h-1? A 8,33 km∙h-1 B 30 km∙h-1 C 108 km∙h-1 D 130 km∙h-1 (2) 1.3 The UNIT in which the rate of flow of charge is measured, is called … A ampere. B coulomb. C volt. D watt. (2) 1.4 The gradient of a velocity versus time graph is equivalent to the … A acceleration. B displacement. C position. D total distance covered. (2) Copyright reserved Please turn over

Physical Sciences/P1 4 DBE/November 2018 CAPS – Grade 10 1.5 An object is released from the top of a frictionless inclined plane, AB, as shown below. A B Which ONE of the following statements regarding the total mechanical energy of the object is CORRECT? A (E p + E k ) A > (E p + E k ) B B (E p + E k ) A < (E p + E k ) B C (E p + E k ) A = (E p + E k ) B D (E p + E k ) A = - (E p + E k ) B (2) 1.6 Two identical light bulbs are connected in parallel, as shown in the circuit diagram below. Voltmeters V 1 and V 2 are connected across each light bulb. V1 V2 Which ONE of the following voltmeter readings is CORRECT? A V1 = V2 B V 1 = 2V 2 C V 1 = ½V 2 D V 1 = ¼V 2 (2) Copyright reserved Please turn over

Physical Sciences/P1 5 DBE/November 2018 CAPS – Grade 10 1.7 Four identical balloons, each carrying a charge, are suspended from a ceiling, as shown in the diagram below. A B C D Balloon B is negatively charged. Which combination is CORRECT regarding the charges on the balloons? SIGN OF CHARGE SIGN OF CHARGE SIGN OF CHARGE ON A ON C ON D A - + - B + + + C - - - D + + - (2) 1.8 Two cyclists are cycling in opposite directions along the side line of a rectangular field. It is observed that they covered the same distance over a time interval of 3 s. Which ONE of the following physical quantities is the SAME regarding the cyclists over the interval of 3 s? A Acceleration B Average speed C Average velocity D Displacement (2) 1.9 Red light of frequency 𝑓 and wavelength 𝜆 shines on an object. The red light is then replaced by light of a higher energy. How do the frequency and the wavelength of light shining on the object now compare with that of red light? FREQUENCY WAVELENGTH A Greater than 𝑓 Remains the same (𝜆) B Less than 𝑓 Greater than 𝜆 C Greater than 𝑓 Less than 𝜆 D Remains the same (𝑓) Less than 𝜆 (2) Copyright reserved Please turn over

Physical Sciences/P1 6 DBE/November 2018 CAPS – Grade 10 1.10 Study the following wave patterns: 1 2 3 4 Which COMBINATION is the CORRECT representation of the wave patterns with the same pitch? A 1 and 2 B 1 and 3 C 1 and 4 D 2 and 4 (2) [20] Copyright reserved Please turn over

Physical Sciences/P1 7 DBE/November 2018 CAPS – Grade 10 QUESTION 2 (Start on a new page.) A baby leaves a bowl of food on the floor and crawls westwards to fetch a toy placed 5 m away. At the same time a dog walks eastwards towards the baby. It takes the baby 30 s to reach the toy. The dog walks past the toy to eat the baby's food in the bowl. N W E S 7m 5m Dog Toy Food bowl 2.1 Define the term displacement in words. (2) 2.2 Determine the position of the dog relative to the baby before they both moved. (2) 2.3 Calculate the average velocity of the baby. (4) 2.4 If the average speed of the dog is TWICE that of the baby, calculate how long it would take the dog to reach the food bowl from the moment the dog started moving. (4) [12] Copyright reserved Please turn over

Physical Sciences/P1 8 DBE/November 2018 CAPS – Grade 10 QUESTION 3 (Start on a new page.) The diagram below shows the positions of an athlete at different time intervals during a race. t=0s 1,5 s 3,0 s 4,5 s 6,0 s 7,5 s 0 3m 6m 12 m 21 m 33 m A B C 3.1 Distinguish between motion with uniform velocity and uniformly accelerated motion. (4) 3.2 What type of motion (motion with uniform velocity or uniformly accelerated motion) is represented by the following intervals? 3.2.1 A to B (1) 3.2.2 B to C (1) 3.3 Use the information in the diagram above to draw an accurate position versus time graph on the graph paper on the attached ANSWER SHEET. (5) 3.4 Define the term instantaneous velocity in words. (2) 3.5 On the graph drawn for QUESTION 3.3, show how you would determine the instantaneous velocity. (2) 3.6 Calculate the velocity of the athlete at 3 s. (4) [19] Copyright reserved Please turn over

Physical Sciences/P1 9 DBE/November 2018 CAPS – Grade 10 QUESTION 4 (Start on a new page.) Two cars, A and B, are moving at speeds of 15 m·s-1 and 30 m·s-1 in the same direction. They are side by side when both drivers observe an obstruction ahead of them, as shown in the diagram below. Obstruction 15 m·s-1 A 30 m·s-1 B Both drivers apply their brakes and accelerate at –4,5 m·s-2 until both cars come to rest. Ignore the reaction time of the drivers. 4.1 Define the term acceleration in words. (2) 4.2 Calculate the: 4.2.1 Time it takes car A to come to rest (4) 4.2.2 Stopping distance of car A (4) 4.3 Which car (A or B) has the longer stopping distance? Support the answer with a calculation. (6) 4.4 What conclusion can be made about the relationship between speed and stopping distance? (2) [18] Copyright reserved Please turn over

Physical Sciences/P1 10 DBE/November 2018 CAPS – Grade 10 QUESTION 5 (Start on a new page.) A skateboarder, starting from the top of a ramp 4,5 m above the ground, skates down the ramp, as shown in the diagram below. The mass of the skateboarder and his board is 65 kg. Ignore the effects of friction. Y 6m 4,5 m X 5.1 Define the term gravitational potential energy in words. (2) 5.2 Calculate the gravitational potential energy of the skater just before he skates down the ramp. (3) 5.3 State the principle of conservation of mechanical energy in words. (2) 5.4 Use the principle stated in QUESTION 5.3 to calculate the magnitude of the velocity of the skateboarder when he reaches the ground at point X. (4) 5.5 Will the skateboarder be able to reach point Y if he were to remain on his skateboard? Write YES or NO and support the answer with a relevant calculation. (5) [16] Copyright reserved Please turn over

Physical Sciences/P1 11 DBE/November 2018 CAPS – Grade 10 QUESTION 6 (Start on a new page.) Study the two transverse waves, P and Q, as shown below. Wave P Wave Q 15 A C 10 5 Position (mm) 0 time (s) 1,5 3,0 -5 -10 -15 B 100 mm D 6.1 Write down ONE difference and ONE similarity between wave P and wave Q. (2) 6.2 For wave pattern P, write down: 6.2.1 Two points that are out of phase (1) 6.2.2 The amplitude of the wave (1) 6.3 Define the term frequency of the wave in words. (2) 6.4 For wave pattern Q, calculate the: 6.4.1 Frequency of the wave (3) 6.4.2 Speed of the wave (3) [12] Copyright reserved Please turn over

Physical Sciences/P1 12 DBE/November 2018 CAPS – Grade 10 QUESTION 7 (Start on a new page.) Experiments were done to investigate the effect of temperature on the speed of sound. One person beat a drum while another person, who was standing 50 m away from the sound source, recorded the time travelled by the sound. 50 m They performed the experiment at different temperatures at different times of the day. They recorded their findings in the table below. TEMPERATURE (°C) TIME (s) 0 0,151 5 0,150 10 0,148 15 0,147 20 0,146 25 0,145 7.1 For the investigation, write down the: 7.1.1 Investigative question (2) 7.1.2 Independent variable (1) 7.1.3 Dependent variable (1) 7.2 Calculate the speed of sound at 20 °C. (3) 7.3 Write down a conclusion for the investigation. (2) The person who beat the drum, noticed that the sound reflected back after a while. 7.4 Name the term used to describe the reflection of sound waves. (1) [10] Copyright reserved Please turn over

Physical Sciences/P1 13 DBE/November 2018 CAPS – Grade 10 QUESTION 8 (Start on a new page.) The types of electromagnetic radiation are arranged according to frequency in the table below. TYPE OF RADIATION FREQUENCY (Hz) Radio waves 105–1010 Microwaves 1010–1011 Infrared 1011–1014 Visible light 1014–1015 Ultraviolet 1015–1016 X-rays 1016–1018 Gamma rays 1018–1021 8.1 How are electromagnetic waves generated? (1) 8.2 What type of electromagnetic radiation has the highest energy? (1) 8.3 Explain the answer to QUESTION 8.2. (2) 8.4 A certain type of electromagnetic radiation has a wavelength of 600 x 10-10 m. 8.4.1 Identify the type of electromagnetic radiation by performing a calculation. (4) 8.4.2 State ONE application of the type of radiation identified in QUESTION 8.4.1. (1) [9] Copyright reserved Please turn over

Physical Sciences/P1 14 DBE/November 2018 CAPS – Grade 10 QUESTION 9 (Start on a new page.) Four metallic bars, suspended freely from a ceiling, interact, as shown in the diagram below. The points of attachment of X and Y on the ceiling are 4 cm apart. 4 cm N 5 cm A X Y B The two bars in the middle are bar magnets (X and Y) and the distance between them is 5 cm. One of the bars (A or B) is made of iron and the other is made of gold. 9.1 Write down the term describing a material that is easily magnetised. (1) 9.2 Which ONE of the bars (A or B) is made of iron? (1) 9.3 Determine the polarity of bar B closest to bar magnet Y. Write only NORTH or SOUTH. (1) 9.4 Explain the answer to QUESTION 9.3. (2) 9.5 Sketch the magnetic field pattern around bar magnet X. (3) 9.6 Bars A and B are now removed and the points of attachment are now 2 cm, as shown in the diagram below. 2 cm X Y 9.6.1 How will the change in the position of the attachment affect the final distance of separation between the bars? Write only GREATER THAN 5 cm, LESS THAN 5 cm or REMAINS at 5 cm. (1) 9.6.2 Explain the answer to QUESTION 9.6.1. (2) [11] Copyright reserved Please turn over

Physical Sciences/P1 15 DBE/November 2018 CAPS – Grade 10 QUESTION 10 (Start on a new page.) Two identical insulated spheres, X and Y, suspended by threads from a ceiling, are held at a small distance apart, as shown in the diagram below. _ +4 x 10-18 C + X Y Sphere X carries a charge of + 4 x 10-18 C, while sphere Y has an excess of 30 electrons. 10.1 Calculate the magnitude of the charge on sphere Y. (3) The spheres are now released and they move towards each other. 10.2 Give a reason why spheres X and Y move towards each other. (2) The spheres are allowed to touch each other. After touching, they move away from each other. 10.3 State the principle of conservation of charge in words. (2) 10.4 Calculate the charge on each sphere after they have separated. (4) [11] Copyright reserved Please turn over

Physical Sciences/P1 16 DBE/November 2018 CAPS – Grade 10 QUESTION 11 (Start on a new page.) 11.1 Consider the circuit diagram below. V1 24 V A1 8Ω S A2 V2 8Ω 8Ω A3 Switch S is OPEN. 11.1.1 Write down the reading on the following: (a) Voltmeter (V 1 ) (1) (b) Ammeter (A 1 ) (1) Switch S is now CLOSED. 11.1.2 Calculate the equivalent resistance of the circuit. (4) 11.1.3 Calculate the reading on voltmeter V 2 . (3) 11.1.4 How do the readings on ammeters A 2 and A 3 compare with each other? (1) Copyright reserved Please turn over

Physical Sciences/P1 17 DBE/November 2018 CAPS – Grade 10 11.2 The graph below shows the relationship between the resistance and the length of the conducting wire. 3,5 3,0 2,5 Resistance (Ω) 2,0 1,5 1,0 0,5 0 10 20 30 40 50 60 70 Length of wire (mm) 11.2.1 Write down the relationship between the resistance and the length of the conducting wire. (1) 11.2.2 Determine the resistance of wire with a length of 30 mm. (1) [12] TOTAL: 150 Copyright reserved

Physical Sciences/P1 DBE/November 2018 CAPS – Grade 10 DATA FOR PHYSICAL SCIENCES GRADE 10 PAPER 1 (PHYSICS) GEGEWENS VIR FISIESE WETENSKAPPE GRAAD 10 VRAESTEL 1 (FISIKA) TABLE 1: PHYSICAL CONSTANTS/TABEL 1: FISIESE KONSTANTES NAME/NAAM SYMBOL/SIMBOOL VALUE/WAARDE Acceleration due to gravity g 9,8 m·s-2 Swaartekragversnelling Speed of light in a vacuum c 3,0 x 108 m·s-1 Spoed van lig in 'n vakuum Planck's constant h 6,63 x 10-34 J·s Planck se konstante Charge on electron e -1,6 x 10-19 C Lading op elektron Electron mass me 9,11 x 10-31 kg Elektronmassa TABLE 2: FORMULAE/TABEL 2: FORMULES MOTION/BEWEGING v f = v i + a ∆t ∆x = v i ∆t + 21 a∆t 2  v + vi  2 2 v f = v i + 2a∆x ∆x =  f  ∆t  2  WORK, ENERGY AND POWER/ARBEID, ENERGIE EN DRYWING 1 1 U = mgh or/of E P = mgh K= mv 2 or/of E k = mv 2 2 2 E M = E k + E p . or/of E M = K + U WAVES, SOUND AND LIGHT/GOLWE, KLANK EN LIG 1 v=fλ T= f c E = hf or/of E = h λ ELECTROSTATICS/ELEKTROSTATIKA Q Q1 + Q 2 n= Q= e 2 Copyright reserved

Physical Sciences/P1 DBE/November 2018 CAPS – Grade 10 ELECTRIC CIRCUITS/ELEKTRIESE STROOMBANE 1 1 1 Q=I∆ t = + + ... R p R1 R 2 W R s = R1 + R 2 + ... V= q Copyright reserved

Physical Sciences/P1 DBE/November 2018 CAPS – Grade 10 ANSWER SHEET Hand in this ANSWER SHEET with the ANSWER BOOK. NAME: _______________________________________________________________ CLASS: __________ QUESTION 3.3 Copyright reserved