NJC 2024 H1 Physics Prelim P1 QP

[Turn over NATIONAL JUNIOR COLLEGE SENIOR HIGH 2 PRELIMINARY EXAMINATION Higher 1 CANDIDATE NAME SUBJECT CLASS REGISTRATION NUMBER PHYSICS Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet 8867/01 18 September 2024 1 hour READ THE INSTRUCTION FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, subject class and registration number on the Answer Sheet in the spaces provided un less this has been done for you. 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. The OAS index number is in a 5-digit format. The 5-digit format is as follows: 2nd digit and the last four digits of the Reg Number. e.g. 2005011 becomes 05011 This document contains 13 printed pages and 3 blank pages. H

2 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 + at2 v2 = u2 + 2as resistors in series R = R1 + R2 + ….. resistors in parallel 1/R = 1/R1 + 1/R2 + …..

3 [Turn over 1 Which of the following gives the correct order of magnitude? pico nano micro A 10–12 10–9 10–6 B 10–12 10–9 10–3 C 10–10 10–9 10–3 D 10–10 10–6 10–3 2 Four physical quantities P, Q, R and S are related by the equation ܲ= ܳ − ܴ ܵ . Which statement must be correct for the equation to be homogeneous? A P, Q, R and S are all scalar quantities. B The product PS is numerically equal to (Q – R). C P, Q, R and S all have the same units. D The product PS has the same units as Q and R. 3 When comparing systematic and random errors, the following pairs of characteristics of errors in an experimental measurement may be contrasted: X1: error can possibly be eliminated X2: error cannot possibly be eliminated Y1: error is of constant sign and magnitude Y2: error is of varying sign and magnitude Z1: error will be reduced by averaging repeated measurements Z2: error will not be reduced by averaging repeated measurements Which properties apply to systematic errors? A X1, Y1, Z2 B X1, Y2, Z2 C X2, Y2, Z1 D X2, Y1, Z1

4 4 Four balances were used to measure the mass of a 1.000 kg weight. Measurement was repeated five times at each balance. The readings obtained and the average value for each balance are shown in the given table. Which balance is not very precise but accurate? Balance Reading / kg Average / kg 1 2 3 4 5 A 1.000 1.000 1.002 1.001 1.002 1.001 B 1.011 0.999 1.001 0.989 0.995 0.999 C 1.012 1.013 1.012 1.014 1.014 1.013 D 0.993 0.987 1.002 1.000 0.983 0.993 5 A block is projected at a certain speed up a frictionless slope. Which of the following graphs correctly shows the relationship between the kinetic energy of the block and the displacement of the block along the slope after its point of projection? A B C D Kinetic Energy displacement Kinetic Energy displacement Kinetic Energy displacement Kinetic Energy displacement displacement

5 [Turn over 6 Drops of water falls from the roof of a building 9.0 m high at regular intervals of time. The first drop reaches the ground at the instant the fourth drop starts its fall. What is the distance between the second and third drops from the roof? A 1.0 m B 3.0 m C 4.0 m D 5.0 m 7 A golfer hits a golf ball on a flat golf course. The golf ball travels a horizontal distance of 500 m before bouncing. It reaches a maximum height of 210 m. What is the approximate angle to the horizontal at which the ball leaves the golf club? Air resistance may be assumed to be negligible. A 30 B 40 C 50 D 60 8 Two blocks of masses m1 and m2 are connected by a light rod as shown. If the blocks are moving with acceleration a down a smooth slope, what is the tension in the rod? A zero B m1a C m2a D (m1 + m2)a 9 Which statement shows an incorrect application of Newton’s Third Law? A The reason why a person is unable to move a heavy box when he pushes it is because the box pushes back on him with an equal force. B When boy A punches boy B with a force of 100 N, boy A will experience a force of 100 N due to boy B. C The weight of the book and the normal force which is acting on the book when placed on a table is not an action-reaction pair. D The pull of the Earth on you and the pull you exert on the Earth is an action - reaction pair. a m1 m2 rod

6 10 Two objects are being pulled along a smooth floor by a 70 N force as shown. Object A has a mass of 20 kg and object B has a mass of 6.0 kg. The masses do not slide against each other. A B 70 N What is the magnitude and direction of the frictional force exerted on A by B? magnitude direction A 16 N to the left B 16 N to the right C 54 N to the left D 54 N to the right 11 In which diagram is the moment of force about point P greatest? A B C D B

7 [Turn over 12 The figure below shows two forces acting on a uniform square plate of metal. Which of the following force(s) would ensure equilibrium when added to the setup above? A B C D Upward force = 6 N Weight = 6 N 5 N 5 N 6 N 6 N 3 N 3 N 3 N

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9 [Turn over 13 An object of mass 20 kg, initially at rest, is acted on by a force F that varies with time according to the figure below. 6 F / N t / s 3 20 What is the velocity of the object at t = 6 s? A 1.5 m s-1 B 3.0 m s-1 C 4.5 m s-1 D 7.0 m s-1 14 The figure below shows a 2.0 kg trolley moving on a frictionless horizontal table at a speed of 0.50 m s-1. 0.50 kg of sand is then released onto the trolley. 0.50 kg of sand 0.50 m s-1 2.0 kg What is the magnitude of the change in the momentum of the trolley? A zero B 0.20 N s C 0.25 N s D 0.40 N s 15 A ball of mass m makes an elastic head -on collision with a second ball initially at rest. The second ball moves off with half the original speed of the first ball. What is the mass of the second ball? A m B 2m C 3m D 4m 0

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