NYGH Prelim 2024 P1 sharing

南洋女子中学校 NANYANG GIRLS' HIGH SCHOOL Preliminary Examination 2024 Secondary Four 'O' Level CANDIDATE NAME CENTRE NUMBER S INDEX NUMBER PHYSICS 6091/01 Paper 1 Multiple Choice 26 Aug 2024, Monday 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, Centre number and index number on the Answer sheet in the spaces provided unless this has already been done for you. 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. 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. Setter: This document consists of 18 printed pages and 2 blank pages. [Turn over

2 1 Which instruments are most suitable for the accurate measurement of the thickness of a 5-cent coin and the internal diameter of a test-tube? thickness of a 5-cent coin internal diameter of a test-tube A micrometer micrometer B micrometer digital calipers C digital calipers metre rule D digital calipers measuring tape 2 The graph shows how displacement varies with time for three cars X, Y and Z. Which statement about the 3 cars is true? car X car Y car Z A decreasing velocity constant velocity moving in the same direction as car X B decreasing velocity not moving moving in the opposite direction as car X C increasing velocity constant velocity moving in the opposite direction as car X D increasing velocity not moving moving in the same direction as car X displacement car X car Y car Z time 0

3 [Turn over 3 A parachutist falling with increasing speed opens her parachute. The parachutist slows down immediately after the parachute is opened. What is the direction of the acceleration of the parachutist before the parachute opens and immediately after the parachute opens? before parachute opens immediately after her parachute opens A downwards downwards B downwards upwards C upwards downwards D upwards upwards 4 The total weight of a gas-filled balloon is 2000 N. The balloon rises at an acceleration of 80 m / s2. Ignore air resistance. What is the total upward force acting on the balloon? A 2000 N B 16 000 N C 18 000 N D 162 000 N 5 A person of weight 600 N at the bottom of a mountain climbs to the top. The gravitational field strength changes from 9.81 N / kg at the bottom to 9.79 N /kg at the top. This mass is unchanged as he climbs. What are his mass and his weight at the top of the mountain? mass at the top of the mountain / kg weight at the top of the mountain / N A 61.2 599 B 61.2 600 C 61.3 599 D 61.3 600

4 6 Four objects of different dimensions are made with different materials. The densities of the materials are uniform. Which object is the most stable? position of center of gravity area of base density of material A high small high B high large low C low small low D low large high 7 Four identical beams have three forces acting on each of them. The beams are in equilibrium. Which beam has both zero resultant force and zero resultant moment? A B C D 30 N 50 N 36 N 70 N 90 N 106 N 50 cm 30 cm 50 cm 30 cm 28 N 35 N 42 N 70 N 63 N 112 N 50 cm 30 cm 50 cm 30 cm

5 [Turn over 8 A builder leaves two identical, heavy, stone tiles resting on soft ground. One is vertical and the other is horizontal. Which row correctly compares the forces and the pressures that the tiles exert on the ground? forces pressures A different different B different same C same different D same same 9 The diagram below shows a hydraulic system. Piston X has a cross-sectional area of 10 cm2 and Piston Y has a cross-sectional area of 5000 cm2. A force of 500 N is applied on piston X. What is the maximum load L on piston Y that can be raised? A 1.00 N B 100 N C 20 000 N D 250 000 N stone tile soft ground stone tile piston X piston Y 500 N

6 10 A manometer is connected to a gas supply. Which change in the manometer will give a greater change in height h for the same change in gas pressure? A using a less dense liquid B using a denser liquid C using a narrower tube D using a wider tube 11 A ball, initially at rest at P, rolls down a smooth slope as shown in the figure below. Air resistance can be ignored. Assume that the gravitational potential energy of the object is zero at R. What is the ratio gravitational potential energy kinetic energy of the ball when it is at Q? A 0.25 B 0.33 C 2.0 D 3.0 h manometer connection to gas supply liquid P Q R

7 [Turn over 12 Work is done when a force of 400 N pulls a crate of weight 500 N at a constant speed along a ramp, as shown. Part of the work done increases the gravitational potential energy E of the crate and the rest is work done W against friction. What are the values of E and W? E / J W /J A 1500 500 B 1500 2000 C 2000 2500 D 3500 500 13 Energy from petrol is used to operate an engine. The engine drives a generator, which produces electrical energy. What is the overall efficiency of the process in producing electrical energy from petrol? A 25 % B 30 % C 55 % D 83 % energy from petrol work done by engine electrical energy 400 J 120 J 100 J

8 14 A substance initially in liquid state at 120 °C is allowed to cool in a room. Which statement describes the energy of the substance from 4 to 5 minutes? A Energy is released by the substance to the environment as the substance is freezing. B Energy is released by the substance to the environment as the average kinetic energy of the particles of the substance is decreasing. C There is no change in average kinetic energy of the particles of the substance as the substance is freezing. D There is no net thermal energy transferred between the substance and the surroundings. 15 A cupboard is placed directly in front of a heater as shown. Air can move through a gap under the cupboard, Which option describes the direction and the relative temperature of the air that moves through the gap? air direction relative air temperature A away from the heater cool B towards the heater cool C away from the heater warm D towards the heater warm time / minutes gap under the cupboard

9 [Turn over 16 Two different liquids, P and Q with the same mass and at 30 °C are heated by the same heat source. Liquid P reaches a temperature of 80 °C faster than liquid Q. Which statement explains why? A Liquid P has a higher specific heat capacity than liquid Q. B Liquid P has a higher specific latent heat of vapourisatio