NHHS 2024 sec4 phy prelim P1

[Turn over] Name: _____________________________________ ( ) Class : Sec 4 / ( ) Subject : Physics Paper : 6091/1 Level : Secondary Four Date : 28 August 2024 Duration : 1 hour Additional Materials: Multiple Choice Answer Sheet 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 separate Answer Sheet in the spaces provided. 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 Answer sheet. INFORMATION FOR CANDIDATES 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 16 printed pages. NAN HUA HIGH SCHOOL PRELIMINARY EXAMINATION 2024

Nan Hua High School Preliminary Examination 2024 Physics 6091/1 Page 2 of 16 1 The diagram shows a simple pendulum Using a stopwatch, which would be the most accurate way to measure the period of the pendulum? A time the motion from P to Q to R and back P B time the motion from P to Q to R and back to P again for 20 cycles and multiply by 20 C time the motion from P to Q to R and back to P again for 20 cycles and divide by 20 D time the motion from P to Q and multiply by 4 2 The diagram shows the graph of velocity against time for an object moving in a straight line. Which of the following is the corresponding graph of displacement against time? A B C D P Q R time velocity 0 0

Nan Hua High School Preliminary Examination 2024 Physics 6091/1 Page 3 of 16 3 A sandbag is projected vertically upwards. The diagram shows how its velocity v changes with time t. The upward direction is taken as positive. Which of the following statement is correct? A the time t1 is 0.90 s B the displacement of the sandbag at t = t1 is 8.1 m C the acceleration of the sandbag at t = t1 is 0 m s−2 D the velocity of the sandbag is decreasing at a decreasing rate 4 Two blocks A and B are placed side by side on a smooth horizontal ground. A horizontal force of 20 N is applied on block A as shown in the diagram. Blocks A and B have mass of 3 kg and 5 kg respectively. Which following statement is correct? A The force exerted on A by B is smaller than the force exerted on B by A. B The force exerted on A by B is the same as the force exerted on B by A. C The force exerted on A by B is larger than the force exerted on B by A. D The acceleration of block B is 4 m s−2. v / m s −1 t / s t1 9 −3

Nan Hua High School Preliminary Examination 2024 Physics 6091/1 Page 4 of 16 5 A mechanical frog jumps vertically upwards on Moon with same initial speed as it did on the Earth. Acceleration due to gravity on Moon is approximately one-six of that on Earth. Which following statement is correct? A The mechanical frog will take a longer time to reach the top and a longer time to come down as compared to jumping on the Earth. B The mechanical frog will take a longer time to reach the top and a shorter time to come down as compared to jumping on the Earth. C The mechanical frog will take a shorter time to reach the top and a longer time to come down as compared to jumping on the Earth. D The mechanical frog will take a shorter time to reach the top and a shorter time to come down as compared to jumping on the Earth. 6 Three forces act on an object in different directions. Which diagram shows the largest resultant force? A B C D 7 Two weights, X and Y are hung on the two ends of a light half-meter rule. The weight of X is twice that of Y. How far from X should the rule be pivoted in order to balance the rule? A 16.7 cm B 33.3 cm C 25.0 cm D 66.7 cm 80 N 40 N 60 N 80 N 40 N 60 N 80 N 40 N 60 N 80 N 40 N 60 N

Nan Hua High School Preliminary Examination 2024 Physics 6091/1 Page 5 of 16 8 The diagrams show the cross-sections of four solid objects with similar mass. Which object is the most stable? A B C D 9 The results obtained in an experiment to determine the density of an unknown material are illustrated in the diagram. What is the density of the unknown material? A 90 kg / m3 B 530 kg / m3 C 900 kg / m3 D 1300 kg / m3 10 A vertical tube, closed at one end, is fully submerged in mercury (Hg). A column of air is trapped inside the tube. Atmospheric pressure is 76 cm Hg. What is the difference between the pressure of air in the tube and the atmospheric pressure? A 20 cm Hg B 60 cm Hg C 96 cm Hg D 136 cm Hg unknown material 96 cm3 40 cm3 50.5 g unknown material same amount of water

Nan Hua High School Preliminary Examination 2024 Physics 6091/1 Page 6 of 16 11 In the diagram, Syringe A is connected to Syringe B through a connecting tube. Both syringes are filled with water. The radius of the piston in syringe B is twice the radius of the piston in syringe A. A force F is applied on the piston in syringe A. What is the force experienced by the piston in syringe B? A 0.25 F B F C 2 F D 4 F 12 Work is done when a force of 150 N pulls a box of mass 25 kg at constant speed along a rough ramp from P to Q, as shown. Gravitational field strength g = 10 N / kg. What is the work done against friction? A 0 J B 250 J C 500 J D 750 J 13 The graph shows how the vertical height through which a winch raises a mass of 10 kg varies with time. What is the power output of the winch? A 5.0 W B 20 W C 50 W D 200 W connecting tube syringe A syringe B 2.0 m P Q

Nan Hua High School Preliminary Examination 2024 Physics 6091/1 Page 7 of 16 14 Which of the following statements about Brownian motion is correct? A In a Brownian motion experiment, the air particles can be observed to move in an irregular, unpredictable fashion. B In a Brownian motion experiment, the smoke particles in air will slow down if the air temperature decreases. C In a Brownian motion experiment, the air particles can be observed to move faster if the temperature increases. D It strictly applies to gases only. 15 A cold solid is placed on top of a hot solid. Thermal energy is transferred from the hot solid to the cold one. What is the explanation for this? A A hot solid expands, so its particles will move further apart. B Energy is transferred from one particle to the next. C Heat always rises. D Molecules are free to move randomly through the solids. 16 A bullet was fired into a copper block of 2.0 kg at an initial temperature of 28.0 °C. The bullet has a mass of 5.0 g and penetrates the copper block at 400 m / s. The specific heat capacity of copper is 400 J / (kg K). Assume that all heat generated in the process is absorbed by the copper block. What is the final temperature of the copper block? A 28.5 °C B 33.0 °C C 78.0 °C D 528.0 °C 17 The diagram shows a graph of temperature against time when 0.50 kg of salt is being heated. If heat energy is supplied to the salt at a rate of 100 W, what is the specific latent heat of fusion of the salt? A 1.4 × 103 J kg−1 B 2.1 × 104 J kg−1 C 8.4 × 104 J kg−