TJC_H1_PHYSICS_P2

1 TEMASEK JUNIOR COLLEGE 2015 Preliminary Examination Higher 1 CANDIDATE NAME CIVICS GROUP INDEX NUMBER PHYSICS Paper 2 Structured Questions Candidates answer on the Question Paper. No Additional Materials are required. 8866/02 28 August 2015 2 hours READ THESE INSTRUCTION FIRST Write your Civics group, 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. 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 1 2 3 4 5 6 7 8 Total This booklet consists of 26 printed pages.

2 Data speed of light in free space, c = 3.00 x 108 m s-1 elementary charge, e = 1.60 x 10-19 C the Planck constant, h = 6.63 x 10-34 J s unified atomic mass constant, u = 1.66 x 10-27 kg rest mass of electron, me = 9.11 x 10-31 kg rest mass of proton, mp = 1.67 x 10-27 kg acceleration of free fall, g = 9.81 m s-2 Formulae uniformly accelerated motion, s = ut + ½at2 v2 = u2 + 2as work done on/by a gas, W = pΔV hydrostatic pressure, p = ρgh resistors in series, R = R1 + R2 + … resistors in parallel, 1/R = 1/R1 + 1/R2 + …

Section A Answer all the questions in this section. 1 A projectile is launched horizontally from a cliff on a distant planet. Fig. 1.1 below plots the horizontal (x) and vertical (y) positions of the projectile every 0.50 s. Fig. 1.1 (a) State an evidence from the plotted data that the planet’s atmosphere had no significant effect on the motion of the projectile. [1] (b) (i) Draw on Fig. 1.1, the displacement vector of the projectile between points E and F of the motion. Label this vector D. [1] 3

4 (ii) Determine the vertical component of the average velocity of the projectile between points E and F. vertical component of average velocity = m s-1 [2] (c) (i) Using the values of y at E, calculate the acceleration due to gravity on this planet. acceleration due to gravity = m s-2 [2] (ii) Assume that the planet has the same density as Earth. From your answer in (c)(i), state and explain whether the radius of the planet is bigger or smaller than that of the Earth. (Given that acceleration due to gravity,  2 Mg r where M is the mass of Earth and r is the radius of Earth.) [2] (d) Another projectile is fired at half the speed of the first one. On Fig 1.1 , plot the positions of this projectile for time in