VJC_H1_PHY_P2

1 Name : ________________________________ CT group : 15S________________ VICTORIA JUNIOR COLLEGE 2016 JC2 PRELIMINARY EXAMINATIONS PHYSICS Higher 1 Paper 2 Structured Questions Candidates answer on the Question Paper No Additional Materials are required. 8866/02 19 Sep 2016 MONDAY 2 pm – 4 pm 2 Hours READ THESE INSTRUCTIONS FIRST Write your name and CT group at the top of this page. 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. 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 2 3 4 5 Section B 6 7 8 Total (max. 80): This question set consists of a total of 19 printed pages.

2 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, s = ut +( ½) at2 v2 = u2 + 2as work done on/by a gas, W = pV hydrostatic pressure, p = hg resistors in series, R = R1 + R2 + … resistors in parallel, 1/R = 1/R1 + 1/R2+ …

3 Section A Answer all questions in this section 1. A traffic policeman hiding behind a signboard detects a car speeding past him with a constant speed of 150 km h-1. He starts his motorcycle 3.0 seconds later and gives chase, accelerating uniformly at 12 m s-2. He overtakes the car at time t1. The time when the car speeds past the policeman is taken to be t = 0.0 s. (a) On the same axes, sketch a speed – time graph for the car and motorcycle. Indicate on the time axis, the moment when the motorcycle overtakes the car as t1. [3] (b) Hence or otherwise, calculate t1. [3] 2. The simplified diagram in Fig 2 represents the trunk of a person bent forward, with the spine at an angle of 70.0o to the vertical. The extensor muscle, which joins the spine to the pelvis, makes an angle of 8.0o to the spinal column. The weight W of the person’s trunk and head, which is 400 N, is shown to act at the point along the spine where the extensor muscle is attached. Pelvis Hip joint pivot W = 400 N Tension T of extensor muscle Head Spine Fig 2 70.0o 8.0o

4 (a) Draw and label an arrow R on Fig 2 to show the direction of the reaction force acting on the spinal column at the hip joint pivot. [1] (b) Explain why there