RVHS H1 PHY P2 QP

River Valley High School Pg 1 of 24 Year 6 H1 Physics 8866 Preliminary Examinations II 2016 RIVER VALLEY HIGH SCHOOL YEAR 6 PRELIMINARY EXAMINATIONS II H1 PHYSICS 8866 PAPER 2 15 SEPTEMBER 2016 2 HOURS CANDIDATE NAME CENTRE NUMBER S INDEX NUMBER CLASS 6 INSTRUCTIONS TO CANDIDATES DO NOT OPEN THIS BOOKLET UNTIL YOU ARE TOLD TO DO SO. Read these notes carefully. Write your name, centre number, index number and class in the spaces at the top of this page and on all work you hand in. Write in dark blue or black pen on both sides of the paper. You may use an HB pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid. The use of an approved scientific calculator is expected where appropriate. Candidates answer on the Question Paper. No Additional Materials are required. Section A Answer all questions. Section B Answer any two questions. You are advised to spend about one hour on each section. The number of marks is given in brackets [ ] at the end of each question or part question. ____________________________________________________________________________ This document consists of 24 printed pages. FOR EXAMINERS’ USE Section A 1 6 2 5 3 6 4 9 5 5 6 9 Section B 7 20 8 20 9 20 Deduction TOTAL 80

River Valley High School Pg 2 of 24 Year 6 H1 Physics 8866 Preliminary Examinations II 2016 Data speed of light in free space, c = 3.00  108 m s–1 elementary charge, e = 1.60  10–19 C the Planck constant, h = 6.63  10–34 J s unified atomic mass constant, u = 1.66  10–27 kg rest mass of electron, me = 9.11  10–31 kg rest mass of proton, mp = 1.67  10–27 kg acceleration of free fall, g = 9.81 m s –2 Formulae uniformly accelerated motion, 21 2su t a t 22 2vu a s work done on/by a gas, Wp V  hydrostatic pressure, p gh resistors in series, 12RR R   resistors in parallel, 121/ 1/ 1/RR R  

River Valley High School Pg 3 of 24 Year 6 H1 Physics 8866 Preliminary Examinations II 2016 [Turn over Section A (40 marks) Answer all the questions in the spaces provided. 1 To estimate the frictional force acting on a truck, the driver puts his truck at the neutral gear (not stepping on the accelerator nor applying any brakes) while moving on a level road. He finds that the speed slows down from 24 km h1 to 18 km h1 over a distance of 10.5 m. The truck is of mass 1500 kg. (a) (i) Show that the frictional force acting on the truck travelling on the level road is 1400 N. [1] (ii) Hence or otherwise, determine the pow er developed by the truck’s engine when it is travelling at a constant speed of 12 m s 1 on the level road. The frictional force can be assumed to be constant. power = …………………………. W [2] (b) The truck then moves up a gentle slope of 1.0  as shown in Fig. 1.1. The frictional force acting on the truck along the slope is 800 N. Fig. 1.1 Applying the same power from the engine as (a)(ii), determine the maximum speed that the truck can attain up the slope. speed = …………………………. m s 1 [3] 1.0  Not to scale

River Valley High School Pg 4 of 24 Year 6 H1 Physics 8866 Preliminary Examinations II 2016 2 An air-rifle pellet of mass 2.0 g travels horizontally towards a stationary clay block of mass 56 g. The pellet reaches the block with a speed of 140 m s –1 and remains in the block after the collision. Fig. 2.1 (a) State the principle of conservation of momentum. ..………………………………………………………………………………………….. ..………………………………………………………………………………………….. [1] (b) Assuming that the total momentum of the pellet and the block is conserved during the collision, calculate the initial speed of the block and pellet after impact. speed = …………………… m s –1 [2] (c) The variation of the momentum of the pellet p with time t is shown in Fig. 2.2. below. The duration of impact (collision) is indicated in the figure. Sketch the variation of the momentum of the block only with time before, during and after the collision. Values of the momentum are not needed in the sketch. [2] Fig.2.2 block pellet block and pellet move together after collision 0 p t Duration of impact

River Valley High School Pg 5 of 24 Year 6 H1 Physics 8866 Preliminary Examinations II 2016 [Turn over 3 (a) Define potential difference. ………………………......................................................................................................... ………………………......................................................................................................... …………………………………………………………………………………………….. [1] (b) For the purpose of measuring the electrical resistance of shoes through the body of the wearer to a metal ground plate, the National Standards Institute (NSI) uses the circuit shown in Fig. 3.1. The potential difference ∆V across the 1.00 M Ω resistor is measured with an ideal voltmeter. Fig. 3.1 (i) Show that the resistance of the shoes is given by        V VRshoes 501000.1 6 [1] 1.00 MΩ 50.0 V

River Valley High School Pg 6 of 24 Year 6 H1 Physics 8866 Preliminary Examinations II 2016 (ii) In a medical test, a current through the human body should not exceed 150 μA. Show with calculations, whether the current delivered by the circuit exceeds 150 μA. State any assumptions made in your calculations. ..…………………………………………………………………………………………. ..…………………………………………………………………………………… [2] (iii) State and explain how the measured value of the resistance of the shoes will change if the voltmeter is not ideal. ..…………………………………………………………………………………………. ..…………………………………………………………………………………………. ..…………………………………………………………………………………… [2]

River Valley High School Pg 7 of 24 Year 6 H1 Physics 8866 Preliminary Examinations II 2016 [Turn over 4. The variation of current I with potential difference V across an electrical component X is shown below in Fig.4.1. Fig. 4.1 (a) Fig. 4.2 shows a battery, a potential divider and component X. Complete Fig. 4.2 to show a setup that can be used to obtain readings for Fig. 4.1. Include in your diagram any other relevant components and measuring instruments. Fig. 4.2 [2] I / A V / V X

River Valley High School Pg 8 of 24 Year 6 H1 Physics 8866 Preliminary Examinations II 2016 (b) With reference to Fig. 4.1, describe how the resistance of X varies with the potential difference across it. ..…………………………………………………………………………………………. ..…………………………………………………………………………………………. ..…………………………………………………………………………………… [2] (c) Component X is now connected across the terminal of a cell of e.m.f. 2.0 V with negligible internal resistance. Using Fig. 4.1, determine the resistance of X. Resistance of X = ……………  [2] (d) A fixed resistor of value 1.0  is connected in series with the cell in (c) and X as shown in Fig. 4.3. Using Fig. 4.1, or otherwise, determine the current in the circuit. Fig. 4.3 current = …………… A [3] 2.0 V X 1.0 

River Valley High School Pg 9 of 24 Year 6 H1 Physics 8866 Preliminary Examinations II 2016 [Turn over 5 (a) (i) Define the tesla. ..…………………………………………………………………………………………. ..…………………………………………………………………………………………. ..…………………………………………………………………………………… [1] (ii) Express the tesla in terms of the product of its base units. base units = …………………………. [1] (b) Two long straight current-carrying conductors X and Y are placed parallel to each other. Conductor X carries a current of 2 A while conductor