2020-Sec-4-Pure-Physics-SA2-Gan-Eng-Seng

This paper consists of 16 pages including the cover page GAN ENG SENG SCHOOL Preliminary Examination 2020 CANDIDATE NAME CLASS INDEX NUMBER PHYSICS Paper 1 Multiple Choice Sec 4 Express 6091/01 14 September 2020 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 correcti on fluid. Write your name, class and index number on the OTAS. There are forty questions in this paper. Answer all questions. F or each question there are four possible answers A , B , C , and D . Choose the one you consider correct and record your choice in s oft 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 ded ucted for a wrong answer. Any rough working should be done in this booklet. Total Marks 40

GESS 4EXP PHY P1 PRELIM 20 CHL 2 1 Which of the following vector addition shows correctly the ad dition of two forces? A B C D 2 Which of the following representing the longest length? A 400 μm B 0.004 Gm C 4 000 dm D 40 Mm 3 Object X falls freely from rest for 3 seconds and object Y al so falls freely from rest for 6 seconds. Which of the following statements is true ? A Y falls half as far as X. B Y falls twice as far as X. C Y falls three times as far as X. D Y falls four times as far as X.

GESS 4EXP PHY P1 PRELIM 20 CHL 3 4 Joash threw a ball vertically upwards at an initial speed of 3 0 m s -1 . What is the distance travelled by the ball 5 s after the throw? A 7 5 m B 6 5 m C 4 5 m D 2 5 m 5 The graph below shows the force acting on a 1 kg block of wood which is originally moving at 6 m s -1 on a table. If the table has a friction of 2 N, what is the velocity-time graph of the wood? F app / N t / s 0 2 3 5 4 8 A B v / m s -1 6 14 20 v / m s -1 0 6 8 10 20 2 3 5 v / m s -1 6 20 8 10 v / m s -1 6 10 14 C D 2 3 5 0 t / s t / s t / s t / s 5 3 2 2 3 5 0 0

GESS 4EXP PHY P1 PRELIM 20 CHL 4 6 Which of the following will experience the largest inertia? A A bowling ball that is rolling at 20 m/s. B A basketball that is falling at a rate of 10 m/s 2 . C An elephant that is at rest. D A car that is travelling at 100 km/h. 7 Hydrometers are used to measure the density of four different liquids, P , Q , R and S as shown. Which arrangement shows correctly the decreasing density of the four liquids? A Q , R , P , S B Q , R , S , P C S , P , Q , R D S , P , R , Q 8 Which of the following statements about gravitational field is correct? A Gravitational field strength of the earth is independent of loc ation. B Gravitational field causes forces on objects because they are c harged. C The gravitational field attraction of the Earth acts towards th e centre of the Earth. D The gravitational field strength on the Moon is less than that on Earth because there is no atmosphere on the Moon. P Q R S

GESS 4EXP PHY P1 PRELIM 20 CHL 5 9 A 200 g metre rule is balanced at the 45 cm mark as shown below . A load of 50 g is now hung at the 15 cm mark. What is the new pivot position that will allow the ruler to b e balanced again? A 39 cm mark B 37 cm mark C 35 cm mark D 30 cm mark 10 An object was spinning about its pivot point, P, due to a f orce F as shown below. Which direction should a force, 2F, be applied to stop the spi nning? pivot P F P A B C D x x x x x/2 x/2 x/2 x/2

GESS 4EXP PHY P1 PRELIM 20 CHL 6 11 In the manometer as shown below, 0.4 m of liquid A was added to gether with liquid B. What is the density of liquid B if the density of liquid A is p ? A 4 p /3 B 3 p /4 C 4 p /7 D 3 p /7 12 The diagram below shows a mercury barometer used to measure the s u r r o u n d i n g atmospheric pressure. What is the pressure measured at X? A 16 cm Hg B 2 2 c m H g C 5 2 c m H g D 6 2 c m H g Atmospheric pressure A 10 20 30 40 50 60 70 80 90 vacuum x cm Liquid A Liquid B

GESS 4EXP PHY P1 PRELIM 20 CHL 7 13 Xavier was pushing a mass 50 kg to the top of the ramp. The g ravitational field strength is 10 N/kg. What is the efficiency of Xavier? A 83.3 % B 1 3 . 3 % C 25.0 % D 8.3 % 14 Donovan was throwing a 500 g basketball upwards with an initia l velocity of 20 m/s. The gravitational field strength is 10 N/kg and assuming no air resistance. What is the gain in potential energy of the basketball after l eaving Donovan’s hand for 1 s? A 100 J B 75 J C 25 J D 1 0 J 200 N 15 m 5 m

GESS 4EXP PHY P1 PRELIM 20 CHL 8 15 A gas is heated in a rigid sealed container. Which quantity doe s not change? A The average speed of the gas particles B The average force exerted on the walls of the container by the gas particles C The average distance between the gas particles D The frequency of collisions on the walls of the container by t he gas particles 16 According to the kinetic theory, matter is made up of very sma ll particles in a constant state of motion. Which row best describes the particle behaviour in the liquid state? forces between particles motion of particles A strong move randomly at high speed B strong vibrate but are free to move position C very strong vibrate to and fro about a fixed position D weak move randomly at high speed 17 All the objects below are made o f the same material and having the same thickness. A B C D Which object will cool down the fastest if they were all being h e a t e d t o t h e s a m e temperature? 18 Which statement about the transfer of thermal energy is correc t? A All metals conduct thermal energy equally well. B Convection can only occur in solids or liquids. C Convection occurs in liquids bec ause hot liquid is denser than cold liquid. D The radiation that transfers thermal energy is a type of elect romagnetic radiation.

GESS 4EXP PHY P1 PRELIM 20 CHL 9 19 When ice changes into water at 0 o C, I work is done in breaking the molecular structure of ice in solid state. II internal energy is increased. III energy is absorbed to raise the temperature. A I only B I I o n l y C I and II only D I, II and III 20 The diagram shows a graph of how the e.m.f., ε / V, of a thermocouple varies with tempera ture, θ / °C. Why is the thermocouple inappropriate for measurement of temper ature in the range as shown? A The thermocouple produces an e.m.f. at 0 °C. B The relationship between ε and θ is non-linear. C The thermocouple does not always indicate a unique value of e.m .f.. D The e.m.f. has not been measured using temperatures using the K elvin scale. ε / V θ / °C

GESS 4EXP PHY P1 PRELIM 20 CHL 10 21 The diagrams show the scal