DHS H1 PHY P2

© DHS 2016 8866/Prelim/02/16 [Turn over DUNMAN HIGH SCHOOL Preliminary Examinations Year 6 Higher 1 PHYSICS Paper 2 Structured Questions Candidates answer on the Question Paper. No Additional Materials are required. 8866/02 September 2016 2 hours READ THESE INSTRUCTIONS FIRST Write your class, index number and name on all the work you hand in. Write in dark blue or black pen on both sides of the paper. You may use a soft pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, highlighters, glue or correction fluid. DO NOT WRITE IN ANY BARCODES. The use of an approved scientific calculator is expected, where appropriate. Section A Answer all questions. Section B Answer any two questions. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question. For Examiner’s Use Section A 1 7 2 5 3 6 4 11 5 11 Section B 6 20 7 20 8 20 Total 80 This document consists of 24 printed pages and 0 blank page. CANDIDATE NAME CLASS INDEX NUMBER

2 © DHS 2016 8866/Prelim/02/16 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

3 © DHS 2016 8866/Prelim/02/16 [Turn over Formulae uniformly accelerated motion, s = ut + 1 2 at 2 v 2 = u 2 + 2as work done on/by a gas, 0B0B0B0B0B0B0BW = p V hydrostatic pressure, 1B1B1B1B1B1B1Bp = 𝜌gh resistors in series, R = R 1 + R 2 + … resistors in parallel, 1/R = 1/R 1 + 1/R 2 + ...

4 © DHS 2016 8866/Prelim/02/16 For Examiner’s Use Section A Answer all the questions in this section. 1 (a) A student throws a ball from point S to a friend at point F. The path of the ball is shown in Fig. 1.1. Fig. 1.1 The points S and F are on the same horizontal level. Air resistance is negligible. The ball is thrown from point S with velocity v, represented by the vector arrow shown in Fig. 1.1. On Fig. 1.1, (i) draw arrows from point S to represent the initial horizontal and vertical components of the velocity v (label these components vH and vV respectively). [1] (ii) draw arrows at A and at B to represent the horizontal and vertical components of the velocity of the ball at these two points. [3] (b) The horizontal distance from S towards F is x. (i) On Fig. 1.2, sketch the variation with x of the potential energy Ep of the ball. [1] Fig. 1.2 Ep 0 S F x

5 © DHS 2016 8866/Prelim/02/16 [Turn over For Examiner’s Use (ii) On Fig. 1.3, sketch the variation with x of the kinetic energy Ek of the ball. [2] Fig. 1.3 2 Fig. 2.1 shows two toy trains T and R held in place on a level track against the force exerted by a compressed spring. Fig. 2.1 When the trains are released, R moves to the right at a speed of 3.8 m s -1. The spring takes 0.25 s to uncoil to its natural length. (a) Calculate the velocity of train T. velocity = ………………………………. m s-1 [2] Ek 0 S F x T R compressed spring 310 g 500 g

6 © DHS 2016 8866/Prelim/02/16 For Examiner’s Use (b) Calculate the average force exerted by the spring on each train. force = ………………………………. N [3] 3 (a) Distinguish between mass and weight. mass: ......…………………………………………………………………………………………. …….……………………………………………………………………………………………….. weight: ....…………………………………………………………………………………………. ….………………………………………………………………………………………….…….[2] (b) A gardener pulls a 50 kg roller along level ground, as shown in Fig. 3.1. The roller moves at a steady speed along the level ground when the handle makes an angle of 30° to the horizontal ground and the gardener pulls with a force of 300 N along the handle. Fig. 3.1 300 N 30°

7 © DHS 2016 8866/Prelim/02/16 [Turn over For Examiner’s Use Determine, (i) the magnitude of the resistive force acting on the roller, and resistive force = ………………………………. N [2] (ii) the vertical contact force acting on the roller due to the ground. vertical contact force = ………………………………. N [2] 4 (a) A double-slit interference experiment is set up using coherent red light as illustrated in Fig. 4.1. Fig. 4.1 (not to scale) The separation of the slits is 0.86 mm. The distance of the screen from the double slit is 2.4 m. A series of light and dark fringes is observed on the screen. (i) State what is meant by coherent light. ….…..………………………………………………………………………………………… ….…………………………………………………………………………………………..[1]

8 © DHS 2016 8866/Prelim/02/16 For Examiner’s Use (ii) Estimate the separation of the dark fringes on the screen. separation = ………………………………. mm [2] (iii) Initially, the light passing through each slit has the same intensity. The intensity of light passing through one slit is now reduced. State and explain the effect, if any, on the intensity of the fringes observed on t he screen. ….…..………………………………………………………………………………………… ….…..………………………………………………………………………………………… ….…………………………………………………………………………………………..[2] (iv) The light is replaced by coherent blue light. State and explain the change in the distance between the bright fringes observed on the screen. ….…..………………………………………………………………………………………… ….…………………………………………………………………………………………..[1] (b) A string of length 80 cm is fixed at both ends. The middle of the string is plucked. This creates a stationary wave pattern on the string with one complete ‘loop’. The string is vibrating in fundamental mode with a frequency of 20 Hz. (i) State the wavelength of the wave. wavelength = ………………………………. cm [1] (ii) Calculate the speed of the wave in the string. speed = ………………………………. m s-1 [1]

9 © DHS 2016 8866/Prelim/02/16 [Turn over For Examiner’s Use (iii) By reference to the formation of the stationary wave on the string, explain what is meant by the speed calculated in (b)(ii). ….…..………………………………………………………………………………………… ….…..………………………………………………………………………………………… ….…..………………………………………………………………………………………… ….…………………………………………………………………………………………..[3] 5 When the structure of the Earth near the surface is surveyed in prospecting for oil or minerals, one frequently used method is that of seismic reflection surveying. The process can be very complex because the strata in the Earth’s crust are by no means regular, and also the quantity of data that is usually received is very large. Some of the principles behind the practice of seismic reflection surveying are explained and used in this question. The data have, however been simplified. In a place where there is horizontal change in rock type at a certain depth, an explosion is set off. Fig. 5.1 shows an arrangement of eight detectors (D 1 – D8) to detect vibrations from the explosion at source S, a short time after the explosion. Fig. 5.1 D1 D8 D2 D3 D4 D5 D6 D7 S surface of Earth rock Route 1 X

10 © DHS 2016 8866/Prelim/02/16 For Examiner’s Use Fig. 5.2 shows the traces received from the eight detectors printed alongside one another. Time t = 0 is the time the explosion commences. Fig. 5.2 The rock through which the waves are travelling is known to have a density of 2700 kg m -3 and in rock of this density, the speed of P -waves is 3.1 km s -1. P-waves are longitudinal waves and are res