2021 Sec 4Exp Phy Prelim P1

This paper consists of 16 pages including the cover page GAN ENG SENG SCHOOL Preliminary Examination 2021 CANDIDATE NAME CLASS INDEX NUMBER PHYSICS Paper 1 Multiple Choice Sec 4 Express 6091/01 13 September 2021 1 hour Additional Materials: OTAS Calculators are allowed in the examination READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, class and index number on the OTAS. There are forty questions in 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 OTAS. Read the instructions on the OTAS 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. Total Marks 40

GESS 4EXP PHY P1 PRELIM 21 CHL 2 1 Which of the following represents the lowest speed? A 200 000 nm/s B 0.02 dm/min C 20 µm/s D 2 cm/h 2 Jovan was using the follo wing pendulum to find out the time taken for the pendulum bob to travel. He released the pendulum bob at A and obtained a total time of 25.28 s as the pendulum bob swings past B twenty times. What is the time taken for the pendulum bob to swing from A to B? A 25.28 / (4 x 20) B 25.28 / (4 x 10) C 25.28 / (2 x 4 x 20) D 25.28 / (2 x 4 x 10) 3 Two balls, A and B, were thrown up by Yong Pang and David respectively. It was observed that ball A landed on the ground much earlier than ball B. What can be deduced based on this observation? Assume there is no resistance during the throw. A Yong Pang threw up the ball with a higher speed than David. B David threw up the ball with a higher speed than Yong Pang. C Ball A is having a higher mass than ball B. D Ball B is having a higher mass than ball A. A C B Point of suspension

GESS 4EXP PHY P1 PRELIM 21 CHL 3 4 The graph below shows the displacement of a falling object with time. What time will it start to experience terminal velocity? A 0 s B 1 s C 3 s D 4 s 5 Darren was pushing a box from rest along a rough surface with a force of 5 N. The box with a mass of 1 kg accelerated at 2 m/s2. What is the friction force on the rough surface? A 1 N B 2 N C 3 N D 7 N 6 Two boxes, P and Q, were pushed along a smooth surface from rest. Box P accelerated twice the acceleration of box Q. Box Q has a mass thrice of box P. Which of the following shows the correction relationship between force exerted on box P, Fp and force on box Q, FQ? A Fp = (2/3) FQ B Fp = (3/2) FQ C Fp = 3 FQ D Fp = 6 FQ Displacement / m 0 1 2 3 4 5 6 7 8 Time / s

GESS 4EXP PHY P1 PRELIM 21 CHL 4 7 Jerome was trying to find out the density of sphere. He dropped one sphere into a measuring cylinder as shown in Fig. 7a while dropping another four identical spheres into the same measuring cylinder as shown in Fig. 7b. He placed 3 spheres on an electronic balance and recorded m g. Fig. 7a Fig. 7b What is the density of the spheres? A (3.3 – 1.7) / 4m B (3.3 – 1.7) / 5m C 4m / [3 x (3.3 – 1.7)] D 3m / [4 x (3.3 – 1.7)] 8 Kenneth was trying to plot a graph of weight against gravitational field strength for a mass. How will the graph be different when the same graph was plotted for different planets? A The graph will be the same as previous. B The graph will now be having a gentle gradient. C The graph will now be having a steeper gradient. D The graph will now show a negative gradient.

GESS 4EXP PHY P1 PRELIM 21 CHL 5 9 Which of the following identifies the type of equilibrium for each diagram correctly? Fig. 9a Fig. 9b Fig. 9a Fig. 9b A Stable Unstable B Unstable Neutral C Unstable Stable D Neutral Unstable 10 Brian was using a light rod balanced with two forces, F 1 and F2 as shown below to test for the principle of moment. Brian increases the value of F1 as he tries to plot a graph of F1 d1 against F2 d2. How will the gradient of the graph changes as the value of F1 increases? A It will remain constant. B It will decrease. C It will increase. D It will not be known unless an experiment is carried out. d1 d2 F1 F2

GESS 4EXP PHY P1 PRELIM 21 CHL 6 11 The diagram below shows a simple hydraulic system. FB is created at piston B as FA is being applied at piston A. Which of the following states accurately FA , FB and the displacement by piston B as piston A is pushed down by 3.0 cm? FA / N FB / N displacement by piston B / cm A 10 30 0.3 B 20 60 1.0 C 30 30 3.0 D 30 10 9.0 12 The diagram below shows a mercury barometer used to measure the surrounding atmospheric pressure. The trapped air has a pressure of 20 cm Hg. What is the point that measured 44 cm Hg? FA FB Piston A 20 cm2 Piston B 60 cm2 x x x x A B C D Trapped air

GESS 4EXP PHY P1 PRELIM 21 CHL 7 13 A 500 g ball was dropped from a height of 5 m. What is the potential energy of the ball when it has dropped 2 m? A 10 J B 15 J C 20 J D 25 J 14 A small object of mass 2.0 kg moves along a track as shown in the diagram below. The speeds of the object at point A and B are 5.0 m/s and 1.0 m/s respectively. The length of the track AB is 4.0 m. What is the average value of frictional force acting on the object as it is moving from A to B? A 2.0 N B 3.0 N C 4.0 N D 6.3 N 15 The function of many machines is to change energy from one form to anoth er as efficiently as possible. Which machine is 90% efficient? A A car engine as it converts 100 J of chemical energy to 90 J of thermal energy. B A electric drill as it converts 80 J of electrical energy to 70 J of kinetic energy. C A solar panel as it converts 20 J of light energy to 18 J of thermal energy. D An electrical heater in a kettle as it converts 70 J electrical energy to 63 J of thermal energy.

GESS 4EXP PHY P1 PRELIM 21 CHL 8 16 Both containers of air, having the same initial temperature, are being heated. Which of the following quantities is/are different for both containers? i The frequency of collisions on the walls of the container by the air particles. ii The average force exerted on the walls of the container by the air particles. iii The average distance between the air particles. iv The average kinetic energy of the air particles. A i, iii B ii, iii C i, ii D iii, iv 17 Which of the following is a property of both liquids and gases? A They always fill their containers. B They are incompressible. C They can flow. D They have molecules in fixed positions. 18 Which of the following will receive the most heat from the sun through conduction? A A large spacecraft in the outer space facing the sun. B The water at the reservoir under the sun. C The solar panel at the roof facing the sun. D The water in the metal can left under the sun. Movable piston air Rigid piston

GESS 4EXP PHY P1 PRELIM 21 CHL 9 19 Roy was conducting a