2024 ACJC J2 H1 Physics Prelim P1

This paper consists of 16 printed pages. Anglo-Chinese Junior College Physics Preliminary Examination Higher 1 PHYSICS Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet 8867/01 13 September 2024 1 hour READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name and index number on the Answer Sheet provided. There are thirty questions on this paper. Answer all questions. For each question there are four possible answers A, B, C and D. Choose the one you consider correct and record your choice in soft pencil on the separate Answer Sheet. Read the instructions on the Answer Sheet very carefully. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any working should be done in this Question Paper. The use of an approved scientific calculator is expected, where appropriate.

2 Anglo-Chinese Junior College 2024 J2 H1 8867 Paper 1 Preliminary Examination DATA AND FORMULAE Data speed of light in free space c = 3.00  108 m s1 elementary charge e = 1.60  1019 C 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 the Avogadro constant NA = 6.02  1023 mol1 gravitational constant G = 6.67  1011 N m2 kg2 acceleration of free fall g = 9.81 m s2 Formulae uniformly accelerated motion s = ut + 1 2 at 2 v 2 = u 2 + 2as resistors in series R = R1 + R2 +  resistors in parallel 1/R = 1/R1 + 1/R2 + 

3 Anglo-Chinese Junior College 2024 J2 H1 8867 Paper 1 Preliminary Examination 1 The maximum theoretical power P of a wind turbine is given by the equation P = k  A v n, where  is the density of air, A is the area swept by the turbine blades, v is the speed of the air and k is a constant with no units. What is the value of n? A 1 B 2 C 3 D 4 2 Two measurements for a solid sphere are shown. mass = (32.5 ± 0.1) g diameter = (1.87 ± 0.04) cm These values are used to determine the density of the sphere. What is the percentage uncertainty in the density? A 2.4% B 4.6% C 6.1% D 6.7% 3 Two cables are attached to a bracket and exert forces as shown. What are the magnitudes of the horizontal and vertical components of the resultant of the two forces? horizontal component / N vertical component / N A 9.7 0.53 B 9.7 11 C 18 0.53 D 18 11 bracket horizontal vertical 15 N 20° 6.0 N 40°

4 Anglo-Chinese Junior College 2024 J2 H1 8867 Paper 1 Preliminary Examination 4 A projectile is launched at an angle  from the vertical. What fraction of its initial velocity does the