2022 NCHS Phy Prelims P1

Name: Register Number: Class: NAN CHIAU HIGH SCHOOL PRELIMINARY EXAMINATION 2022 SECONDARY FOUR EXPRESS PHYSICS 6091/01 Paper 1 Multiple Choice 30 Aug 2022 Tuesday 1 hour Candidates answer on the OTAS. INSTRUCTIONS TO CANDIDATES Write your name, class and register number in the spaces provided at the top of this page. 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 OTAS. Each correct answer will score one mark. The total marks for this paper is 40. Take gravitational field strength of Earth = 10 N kg-1 and acceleration due to gravity = 10 m s-2. For Marker’s Use

2 This paper consists of 16 printed pages including the cover page. 1 What is the order of magnitude of the mass of a typical motor car (without driver and passengers) in kg? A 1 x 10 B 1 x 102 C 1 x 103 D 1 x 104 2 A micrometer screw gauge is used to measure the thickness of a coin. The diagrams show the scales of the micrometer when the jaws are closed with no coin and when the jaws are closed with the coin respectively. What is the thickness of the coin? A 3.35 mm B 3.39 mm C 3.85 mm D 3.89 mm 3 The diagram shows how the kinetic energy (KE) of the bob of an oscillating simple pendulum varies with time. What is the period of the pendulum in second? A 0.2 B 0.4 C 0.5 D 0.6 KE / mJ time / s mJ 0 0.2 0.4 0.6 10

3 4 An uniform flat piece of metal sheet has a density of 8.0 g/cm3. One quarter of the metal sheet is cut out as shown. What is the density of the one-quarter metal sheet? A 2.0 g/cm3 B 4.0 g/cm3 C 8.0 g/cm3 D 32.0 g/cm3 5 A car is moving in a straight line horizontally at a constant speed of 20 m/s. The car engine produces a constant power of 28,000 W. What is the frictional force acting on the car when the efficiency of the car engine is 71 %? A 990 N B 2000 N C 20 000 N D 400,000 N 6 A boy pushes a box 10 m along a rough, horizontal floor with a force of 5.0 N. The frictional force between the floor and the box is 2.0 N. What is the work done against the friction, the work done by the boy and the energy gained by the box? work done against friction/ J work done by boy/ J energy gained by box/ J A 20 50 30 B 20 50 50 C 30 50 50 D 30 50 30

4 7 The diagram shows two divers of different masses diving with the same initial speed from the same height into a pool. Air resistance is negligible. Which physical quantity is different between the divers just before they hit the water? A acceleration B duration of free fall C kinetic energy D speed 8 A parachutist has opened his parachute and is falling to Earth at constant speed. What is the principal energy conversion taking place as he falls? A gravitational potential energy to kinetic energy B gravitational potential energy to thermal energy C kinetic energy to gravitational potential energy D kinetic energy to thermal en