2024 EJC J2 H1 PRELIM QP P1

©EJC 2024 8867/J2H1PRELIM/2024 [Turn over EUNOIA JUNIOR COLLEGE JC2 PRELIM EXAMINATIONS 2024 General Certificate of Education Advanced Level Higher 1 CANDIDATE NAME CIVICS GROUP 2 3 - REGISTRATION NUMBER PHYSICS Multiple Choice 8867/01 September 2024 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write your name, civics group and registration number on all the work you hand in. The use of an approved scientific calculator is expected where appropriate. Answer all questions. There are thirty questions in this section. 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. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. This document consists of 20 printed pages.

2 ©EJC 2024 8867/J2H1PRELIM/2024 Data Formulae uniformly accelerated motion             2 2 2 1 2 1 2 1 2 2 1 1 1 s at u as R / R / R u v / R t R R resistors in series resistors in parallel speed of light in free space                         8 1 19 27 31 e 27 p 23 1 A 11 2 2 2 3 00 1 60 9 11 1 10 m s 10 C 1 66 10 kg 10 kg 10 kg 6 02 10 mol 10 N m k 6 1 g m 7 s 7 6 6 9 8 c u . e . . . N G . g . m m . . elementary charge unified atomic mass constant rest mass of electron rest mass of proton the Avogadro constant gravitational constant acceleration of free fall

3 ©EJC 2024 8867/J2H1PRELIM/2024 [Turn over 1 When a beam of light is incident on a surface, it delivers energy to the surface. The intensity of the beam is defined as energy delivered per unit area per unit time. What is the unit of intensity, expressed in SI base units? A -2 -1kg m s B 2 -3kg m s C -2kg s D -3kg s 2 To find the resistivity of a semiconductor, a student makes the following measurements of a cylindrical rod of the material. Length = 25 1 mm Diameter =5.0 0.1 mm Resistance = 68 1   He calculates the resistivity to be 5.34  10-2  m. How should the uncertainty be included in his statement of the resistivity? A 2(5.3 0.1) 10 m   B 2(5.3 0.5) 10 m   C 2(5.34 0.07) 10 m   D 2(5.34 0.09) 10 m   3 What is the approximate volume of a typical inflated rubber party balloon? A 0.001 m3 B 0.01 m3 C 0.1 m3 D 1 m3 4 The acceleration of free fall on the Moon is one-sixth of that on Earth. On Earth it takes time t for a stone to fall from rest a distance of 2 m. What is the time taken for a stone to fall from rest the same distance on the Moon? A 1 6 t B 1 6 t C 6t D 6 t

4 ©EJC 2024 8867/J2H1PRELIM/2024 5 A projectile is fired at an angle above the horizontal with an initial speed u. Which one of the following graphs best represents the subsequent variation of speed v of the projectile with time t? A B C D

5 ©EJC 2024 8867/J2H1PRELIM/2024 [Turn over 6 The graph below shows how the force acting on a 2.0 kg body varies with time. The body is initially moving in a straight line at 2.0 m s1, and the force is applied on the body in the direction of its motion. What is the speed of the body at the end of 3.0 s? A 4.0 m s1 B 6.5 m s1 C 9.0 m s1 D 11.0 m s1 7 Three blocks X, Y and Z, of masses m, 3m and 4m respectively, are accelerated along a smooth horizontal surface by a force F applied to block X as shown. What is the ratio of the force exerted on block X by block Y the force on block Y by block Z ? A 1 4 B 3 8 C 7 8 D 7 4 Y Z F 2.0 F / N t / s 3.0 0 5.0 1.0 3m m 4m

6 ©EJC 2024 8867/J2H1PRELIM/2024 8 Two gliders of equal mass, each fitted with a magnet, move along a linear air track without friction. They move towards each other with equal initial speeds. As they approach, the magnets repel each other. Each glider decelerates to rest, then accelerates and moves off in the opposite direction. Which statement is true throughout the whole motion? A Momentum is conserved because no external force acts on the gliders. B Momentum is not conserved because, at the instant of the closest approach, both gliders are at rest. C Kinetic energy is conserved because none is converted to heat. D Kinetic energy is not conserved because neither moves at constant speed. S N N S magnets glider glider

7 ©EJC 2024 8867/J2H1PRELIM/2024 [Turn over 9 A large mass moving at a velocity of 5 m s-1 collides head-on with a small mass moving at a velocity of 2 m s-1 in the opposite direction. The collision is elastic. After the collision , both masses move to the right. The large mass has a velocity v1 and the small mass has a velocity v2. Which pair of values of v1 and v2 is possible? v1 / m s1 v2 / m s1 A 2 5 B 3 10 C 4 4 D 5 12 large mass small mass 5 m s1 2 m s1

8 ©EJC 2024 8867/J2H1PRELIM/2024 10 Three springs are arranged vertically as shown. Springs P and Q are identical and have spring constant k. Spring R has spring constant 3k. What is the increase in the overall length of the arrangement when a force W is applied as shown? A 5 6 W k B 4 3 W k C 7 2 kW D 4 kW P R Q W

9 ©EJC 2024 8867/J2H1PRELIM/2024 [Turn over 11 A wire is stretched by an increasing force. A graph of force against extension is shown. What is the work done in stretching the wire to the first point where it no longer obeys Hooke’s Law? A 0.28 J B 0.56 J C 280 J D 2500 J force / N extension / mm 20 40 0 0 20 40 60 80

10 ©EJC 2024 8867/J2H1PRELIM/2024 12 A picture is hung by a cord from a nail. Which vector triangle represents the resultant force R of the two tension forces T in the cords? A B C D T T   T T  T T  T T  T T 