EJC Physics 2020 J2 H1 JCT P1 QP

©EJC 2020 8867/01/J2H1MCT/2020 EUNOIA JUNIOR COLLEGE JC2 June Common Test 2020 General Certificate of Education Advanced Level Higher 1 PHYSICS Paper 1 Multiple Choice 8867/01 June/July 2020 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use paper clips, glue or correction fluid. Write your name, civics group and registration number on the Answer Sheet in the spaces 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 rough working should be done in this booklet. The use of an approved scientific calculator is expected, where appropriate. This document consists of 14 printed pages and 0 blank page.

2 ©EJC 2020 8867/01/J2H1MYE/2020 Data Formulae uniformly accelerated motion, s = ut + ½at2 v2 = u2 + 2as resistors in series, R = R1 + R2 + … resistors in parallel, 1/R = 1/R1 + 1/R2 + … speed of light in free space, c = 3.00 × 10 8 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

3 ©EJC 2020 8867/01/J2H1MCT/2020 [Turn over 1 An athlete of mass 80 kg completes in a 100 m race. What is the best estimate of his mean kinetic energy during the race? A 4 x 102 J B 4 x 103 J C 4 x 104 J D 4 x 105 J 2 In the following equation, P is pressure, h is height, x is density and g is acceleration: 21 constant2 xy xhg P+ += What is the base unit of y? A m s-1 B m2 s-2 C N kg-1 m D N1/2 kg-1/2 m1/2 3 A student measured the diameter of a ping pong ball as 3.40 cm using a pair of vernier calipers. The uncertainty in the measurement is 0.01 cm. How should the total volume of the ping pong ball be expressed? A (20.579 ± 0.009) cm3 B (20.58 ± 0.03) cm3 C (20.6 ± 0.1) cm3 D (20.6 ± 0.2) cm3 4 A force F is exerted on a freely moving object. At one instant in time, the object has velocity v and acceleration a. Which of the three quantities must be directed in the same direction? A a and v only B a and F only C v and F only D a, v and F

4 ©EJC 2020 8867/01/J2H1MYE/2020 5 The graph shows how a certain quantity p varies with another quantity q for a parachutist falling at terminal speed. What are the quantities p and q, and what is represented by the magnitude of the gradient of the graph? quantity p quantity q magnitude of gradient A height time terminal speed B momentum time weight of parachutist C height potential energy mass of parachutist D velocity time acceleration of free fall 6 The variation of force F on a body of mass 2.0 kg with time t is shown in the diagram below. At time t = 2.0 s, the velocity of the object is 5.0 m s-1. What is the velocity of the body at time t = 4.0 s? A 4.1 m s-1 B 6.3 m s-1 C 7.5 m s-1 D 11 m s-1

5 ©EJC 2020 8867/01/J2H1MCT/2020 [Turn over 7 Two stones, X and Y, of different mass are dropped from the top of a cliff. Stone Y is dropped a short time after stone X. Air resistance is negligible. Which of the following statement is true? A The distance between them will decrease if the mass of Y is more than the mass of X. B The distance between them will increase if the mass of X is more than the mass of Y. C The distance between them will decrease regardless of the mass of X and Y. D The distance between them will increase regardless of the mass of X and Y. 8 Two blocks A and B of masses 4.0 kg and 2.0 kg respectively are connected by an inextensible string across a smooth pulley as shown in the diagram. The frictional forces between the surface and the two blocks are negligible. What is the acceleration of block B when block A is released? A 0.43 m s-2 B 2.8 m s-2 C 5.9 m s-2 D 6.6 m s-2 9 A bullet of mass 20 g is fired horizontally from a rifle at a stationary lead block of mass 500 g. The bullet hits the centre of the block with a velocity of 230 m s-1. The lead block with the embedded bullet slides after impact with a constant frictional force of 30 N throughout the sliding. How far did the block slide before it stops? A 0.27 m B 0.41 m C 0.53 m D 0.68 m

6 ©EJC 2020 8867/01/J2H1MYE/2020 10 A man of mass M is standing on a weighing scale in an elevator. The elevator undergoes several different motions as described below. Elevator’s motion Weighing scale reading Moving downwards and coming to rest with uniform deceleration N1 Moving downwards and speeding up with constant acceleration N2 Moving downwards with constant speed N3 Which of the following is correct? A N1 = N2 = N3 B N1 < N2 < N3. C N1 < N3 < N2 D N2 < N3 < N1 11 A light spring is permanently connected between two blocks of wood on a frictionless surface. The mass of the blocks are 2.0 kg and 5.0 kg and they can move freely along a straight horizontal track. The spring is compressed and then the blocks are released simultaneously from rest. What is the acceleration of the lighter block when the acceleration of the heavier block is 10 m s-2? A 5 m s-2 B 10 m s-2 C 20 m s-2 D 25 m s-2

7 ©EJC 2020 8867/01/J2H1MCT/2020 [Turn over 12 A cupboard is attached to a wall by a screw. Which force diagram shows the cupboard in equilibrium, with the weight W of the cupboard, the force S that the screw exerts on the cupboard and the force R that the wall exerts on the cupboard? The magnitude of the forces are not drawn to scale. 13 What is not true of two forces that give rise to a couple? A They act in opposite directions. B They both act at the same point. C They both act on the same body. D They both have the same magnitude.

8 ©EJC 2020 8867/01/J2H1MYE/2020 14 A uniform horizontal beam of length L and weight 200 N is attached to the wall by means of a cable as shown in the figure below. A boy weighing 500 N, stands 0.2L away from the wall. What is the tension in the cable? A 200 N B 231 N C 500 N D 808 N 15 A spring obeying Hooke’s law possesses elastic potential energy of 15 J when stretched by 60 mm. How much more elastic potential energy does it have when it is further stretched by another 30 mm? A 3.75 J B 18.8 J C 21.9 J D 33.8 J 16 A person pushes a box of weight 200 N so that it moves at a steady speed along a ramp, through a height of 1.5 m. The ramp makes an angle of 30° with the ground. The frictional force on the box is 150 N while the box is moving. What is the work done by the person? A 170 J B 300 J C 450 J D 750 J

9 ©EJC 2020 8867/01/J2H1MCT/2020 [Turn over 17 An armoured tank of mass of 26.5 × 103 kg is outfitted with an engine capable of 370 kW power output. It travels at a constant speed of 14.7 m s-1 on level ground. As it moves up a particular slope, its speed falls to a constant 10.0 m s-1. Assuming that the total resistive force acting on the tank is constant, what is the angle of the slope? A 2.6° B 5.6° C 84.4° D 87.4° 18 A pendulum bob of mass m is attached to a string of length L. With the string taut, it is