2022 RSS Phy Prelims P2

1 Riverside Secondary School 6091/02/4E/PRELIM/2022 [Turn over RIVERSIDE SECONDARY SCHOOL SUBJECT : Physics SUBJECT CODE & PAPER : 6091/02 LEVEL/STREAM : 4 Express DURATION : 1 hour 45 minutes READ THESE INSTRUCTIONS FIRST Write your name, index number and class on all the work you hand in. Write in dark blue or black pen. You may use an HB pencil for any diagrams or graphs. Do not use staples, paper clips, highlighters, glue or correction fluid. Section A Answer all questions. Section B Answer all questions. Question 11 has a choice of parts to answer. Candidates are reminded that all quantitative answers should include appropriate units. The use of an approved scientific calculator is expected, where appropriate. Candidates are advised to show all their working in a clear and orderly manner, as more marks are awarded for sound use of Physics than for correct answers. At the end of the examination, submit Section A and B separately. The number of marks is given in brackets [ ] at the end of each question or part question. __________________________________________________________________________ This document consists of 24 printed pages. Section A NAME: NO: CLASS: PRELIMINARY EXAMINATION 2022

2 Riverside Secondary School 6091/02/4E/PRELIM/2022 [Turn over Section A Answer all the questions in this section. 1 (a) An athlete uses an exercise machine, as shown in Fig. 1.1. Fig.6.1 The athlete moves backwards and forwards along the track. As he pulls the handle, he moves backwards and the machine displays the force exerted by the athlete. At the end of the track he stops pulling and then returns to the position shown. This is one complete movement. (a) An accurate value for the average time for one complete movement is obtained. Describe what measurements are taken and how they are used to find the average time for one complete movement. ………………………………………………………………………………...………….…… ………………………………………………………………………………...………….…… ………………………………………………………………………………...…………….… ………………………………………………………………………………...………….…… ………………………………………………………………………………...………….…… ………………………………………………………………………………...………….…… ………………………………………………………………………………...……….……… …………………………………………………………………………..……………..….. [3] (b) A student wants to calculate the average power input to the machine by the athlete. Apart from the measurement in (a) and the average force exerted, state the other measurement that is needed. ………………………………………………………………………………………………… …………………………………………………………………………………….………. [1] 2 A train of mass 1.8 x 105 kg is at rest in a station. At time t = 0, the train begins to accelerate Fig. 1.1 track exercise machine

3 Riverside Secondary School