2022 SJI Phy Prelims P1

ST JOSEPH’S INSTITUTION PRELIMINARY EXAMINATION 2022 (YEAR 4) CANDIDATE NAME CLASS INDEX NUMBER PHYSICS Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet 6091/1 13 September 2022 1 hour (10:00 – 11:00) 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 multiple choice answer sheet. 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 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 question paper. The use of an approved scientific calculator is expected, where appropriate. This document consists of 23 printed pages including this cover page.

2 1 What are the SI base units of pressure? A N/m2 B kg/m2 C kgm/s2 D kg/ms2 2 The figure below shows the velocity-time graphs of two cars travelling side by side on a straight level road. The cars start their journey from the same starting line. Which of the following statement(s) is/are correct? 1 Car B passes car A at t = tP. 2 Both cars have equal velocity at t = tP. 3 Car B has a higher acceleration than car A at t = 0. A 1 and 3 only B 2 only C 2 and 3 only D 1, 2 and 3

3 3 A steel ball is dropped from a height onto a hard floor. Taking the downward direction to be positive, the following displacement time graph describes the motion of the bouncing ball. Which of the points, A, B, C or D indicates the second time that the ball hits the floor? A point A B point B C point C D point D 4 A child with a mass of 25 kg is hanging from the ceiling of an elevator by a rope. The elevator is travelling upwards at a constant deceleration of 1.0 m/s2. What is the force exerted by the rope on the child? A 0 N B 225 N C 250 N D 275 N elevator rope

4 5 Which diagram shows the magnitude and direction of the resultant R of the two forces F1 and F2? A B C D 6 A momentary force is applied to a hockey puck on a frictionless skating rink. Assuming air resistance is negligible, which of the following statements best describes the subsequent motion of the hockey puck? A It accelerates uniformly. B It decelerates to rest uniformly. C It moves with uniform velocity. D It stops abruptly.

5 7 The diagram shows a pail containing water and sand. More sand is added to the pail. This affects the position of the centre of gravity of the pail and its content