SJI 2022 Prelim P1

ST JOSEPH’S INSTITUTION PRELIMINARY EXAMINATION 2022 (YEAR 4) CANDIDATE NAME CLASS INDEX NUMBER PHYSICS Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet 6091/1 13 September 2022 1 hour (10:00 – 11:00) READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue, or correction fluid. Write your name, class and index number in the multiple choice answer sheet. There are forty 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 Multiple Choice 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 on this question paper. The use of an approved scientific calculator is expected, where appropriate. This document consists of 23 printed pages including this cover page.

2 1 What are the SI base units of pressure? A N/m2 B kg/m2 C kgm/s2 D kg/ms2 2 The figure below shows the velocity-time graphs of two cars travelling side by side on a straight level road. The cars start their journey from the same starting line. Which of the following statement(s) is/are correct? 1 Car B passes car A at t = tP. 2 Both cars have equal velocity at t = tP. 3 Car B has a higher acceleration than car A at t = 0. A 1 and 3 only B 2 only C 2 and 3 only D 1, 2 and 3

3 3 A steel ball is dropped from a height onto a hard floor. Taking the downward direction to be positive, the following displacement time graph describes the motion of the bouncing ball. Which of the points, A, B, C or D indicates the second time that the ball hits the floor? A point A B point B C point C D point D 4 A child with a mass of 25 kg is hanging from the ceiling of an elevator by a rope. The elevator is travelling upwards at a constant deceleration of 1.0 m/s2. What is the force exerted by the rope on the child? A 0 N B 225 N C 250 N D 275 N elevator rope

4 5 Which diagram shows the magnitude and direction of the resultant R of the two forces F1 and F2? A B C D 6 A momentary force is applied to a hockey puck on a frictionless skating rink. Assuming air resistance is negligible, which of the following statements best describes the subsequent motion of the hockey puck? A It accelerates uniformly. B It decelerates to rest uniformly. C It moves with uniform velocity. D It stops abruptly.

5 7 The diagram shows a pail containing water and sand. More sand is added to the pail. This affects the position of the centre of gravity of the pail and its contents, and the stability of the pail. Which of the following shows how the position of the centre of gravity and the stability of the pail will be affected? centre of gravity stability A moves from X towards Y decreases B moves from X towards Y increases C moves from Y towards Z decreases D moves from Y towards Z increases 8 An object is released from rest from a height h. The velocity of the object after falling a distance, h/2 is v1. The velocity of the object after falling a distance, h is v2. If air resistance is negligible, what is the ratio of v2 to v1? A 0.50 B 0.71 C 1.4 D 2.0 9 A beaker floats in a container of liquid as shown. The cross -sectional area of the beaker is 0.012 m 2. The weight of the beaker is 32 N. What is the density of the liquid? A 670 kg/m3 B 890 kg/m3 C 6700 kg/m3 D 8900 kg/m3 X Y Z water sand

6 10 The lengths of the alcohol thread in a thermometer are 5.0 cm and 25.0 cm when the temperatures are 10 oC and 78 oC respectively. When the thermometer bulb is placed in a liquid, the length of the alcohol thread is 3.0 cm. What is the temperature of the liquid? A 3.2 oC B 6.0 oC C 6.8 oC D 10.2 oC 11 What surrounds the bulb of a thermometer during the marking the upper and lower fixed points? upper fixed point 100 oC lower fixed point 0 oC A boiling water pure ice B boiling water pure melting ice C steam pure ice D steam pure melting ice 12 Which graph shows the relationship between the pressure and the volume of a fixed mass of gas at constant temperature? A B C D volume volume volume volume pressure pressure pressure pressure

7 13 The diagram shows a glass tube filled with water and suspended above a bench. The water is free to circulate around the tube. At point P, there is a convection current moving in a downwards direction. At which point is the tube heated to cause this convection current? 14 The fins of a car radiator system, as shown in the diagram, is very efficient in removing the heat generated from its engine. Which of the following statements best explains this? A A high temperature difference between the radiator and surroundings allows a high rate of heat loss by conduction. B The design of the radiator allows heat to be transferred to the surroundings rapidly by convection. C The radiator fins increases surface area allowing a high rate of heat transfer. D The radiator is made of metal, which is a good thermal conductor. radiator fins

8 15 A 0.50 kg ball is released from rest from the top of a rough 200 m slope at X, as shown in the diagram. It comes to a stop at Y. Assuming all the work done against friction is converted to the increase in the thermal energy of the ball, what will be the rise in the temperature of the ball? The gravitational field strength g is 10N/kg and the specific heat capacity of the ball is 400 J/kgoC. A 0.50 oC B 0.75 oC C 1.5 oC D 3.0 oC 16 The diagram below shows how the temperature of a substance, initially in gaseous state, varied with time. Which of the following correctly describes what happened to the internal kinetic energy and to the internal potential energy of the molecules of the substance during processes X and Y? internal kinetic energy internal potential energy X Y X Y A constant decrease decrease constant B constant decrease increase constant C decrease constant increase constant D decrease decrease increase constant time / s X Y temperature / oC

9 17 The diagram shows a water wave travelling at a speed of 20 cm/s to the right. At time = 0, particle X is at the crest of the wave. Particle Y is 30 cm to the right of particle X. Which of the following shows a possible displacement-time graph of particle Y? A B C D X dY / mm t/s 2 0 dY / mm t/s 0.5 0 dY / mm t/s 0.5 0 dY / mm t/s 2 0

10 18 A pendulum bob oscillates above a water surface, creating a water wave moving towards a hard surface AB. Which of the following shows the reflection of the water wave by the hard surface AB? A B C D