beatty BTYSS 4E5N ScPhy PRELIM 2020 QP1

SUBJECT : Science LEVEL : Sec 4E/5N PAPER : 5076 / 1 DURATION : 1 hour SETTER : Mrs Seah-Pay Ling Ling DATE : 1 Sept 2020 CLASS : NAME : REG NO : READ THESE INSTRUCTIONS FIRST: Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your class, name and index number on the 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. 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. A copy of the Periodic Table and Data page is provided on the last 2 pages. _______________________________________________________________________________________________ This paper consists of 10 printed pages (including this cover page, periodic table and Data page) BEATTY SECONDARY SCHOOL PRELIMINARY EXAMINATION 2020 [Turn over

- 2 - 1 Which row is not a correct unit for the corresponding physical quantity? physical quantity unit A acceleration N/kg B current C/s C power J/kg D pressure Pa 2 Study the four equations shown below. force = mass x acceleration power = velocity = density = How many different scalar quantities can be found in these equations? A 5 B 6 C 7 D 8 3 Two forces P and Q act on a body. R is the resultant of these two forces. Which vector diagram could represent the relationship between the forces, P, Q and R? A B C D P Q R Q P R P Q R P Q R

- 3 - 4 The velocity-time graphs for two vehicles X and Y are shown below. The acceleration and distance travelled by the two vehicles can be estimated from the graphs. Which statement about the velocity-time graphs are correct? A The acceleration of X and Y are the same at 2.5 s. B The distance travelled by X and Y in the 5 s period is the same. C The distance travelled by X is greater than that travelled by Y in the 5 s period. D The initial acceleration of Y is greater than that of X. velocity / m/s time / s X Y

- 4 - 5 If a parachutist of mass 50 kg falls with constant velocity, what is the magnitude of air resistance acting on the parachutist? A 0 N B 5N C 50 N D 500 N 6 A block of mass 350 g is gently lowered into a displacement can that is filled with water. All the displaced water is collected in a beaker. If the density of the block is 6500 kg /m3 and the density of water is 1000 kg/m3, what is th