SJI 2018 Prelim P1

ST JOSEPH’S INSTITUTION PRELIMINARY EXAMINATION 2018 (YEAR 4) CANDIDATE NAME CLASS INDEX NUMBER PHYSICS Paper 1 Additional Materials: Multiple Choice Answer Sheet 6091/01 28 August 2018 1 hour (08:00 – 09:00) 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 spaces provided. 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 reco rd 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 booklet. The use of an approved scientific calculator is expected, where appropriate. This document consists of 15 printed pages including this cover page. [Turn Over

2 1 Fig 1.1 shows a micrometer screw gauge when it is fully closed. Fig. 1.2 shows the micrometer screw gauge when measuring the thickness of a metal sheet. Fig 1.1 Fig 1.2 What is the correct reading for the thickness of the metal sheet? A 5.45 mm B 5.50 mm C 5.55 mm D 5.95 mm 2 One oscillation of a swinging pendulum occurs when the bob moves from X to Z and back to X again. Y is the middle point of the oscillation. The first time the pendulum passes through Y, a stopwatch is started. How many times would the pendulum pass through Y to go through 20 oscillations? A 20 B 21 C 41 D 42 3 An object is thrown vertically upward. If air resistance is negligible, what is the acceleration and the velocity of the object when it is at the highest point? acceleration velocity A 10 m/s2  Max  B 10 m/s2  Max  C 10 m/s2  0 m/s D 0 m/s2  0 m/s X Z mm mm

3 4 An object is released from rest from a height above the ground. If air resistance acts on the object, which graph correctly shows the motion of the object? A B C D 5 A crane lifts a 20 kg object from rest. The object moves upward at a constant acceleration of 4.0 m/s2. What is the tension of the crane acting on the object? A 80 N B 120 N C 200N D 280 N 6 The figure below shows a uniform plank of negligible mass of length L, pivoted at P. Two downward forces, F and 30 N act on the two ends such that the plank is horizontal. What is the magnitude of the force acting on the plank at the pivot? A 24 N B 60 N C 120 N D 150 N v/m/s t/s v/m/s t/s s/m t/s s/m t/s 0.80 L 30 N F P

4 7 A book of weight, W slides along a smooth table-top until it falls off from the edge of the table at time, T. The figure below shows the path of the book.