2024 HCI H1 Physics Paper 2 Question Paper

This document consists of 26 printed pages. HWA CHONG INSTITUTION JC2 Preliminary Examination Higher 1 CANDIDATE NAME CT GROUP 23S CENTRE NUMBER INDEX NUMBER PHYSICS Paper 2 Structured Questions Candidates answer on the Question Paper. No Additional Materials are required. 8867/02 10 September 2024 2 hours READ THESE INSTRUCTIONS FIRST Write your Centre Number, index number and name in the spaces at the top of this page. Write in dark blue or black pen on both sides of the paper. You may use an HB pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid. The use of an approved scientific calculator is expected, where appropriate. For Examiner’s Use Paper 2 Section A 1 6 2 7 3 12 4 8 5 12 6 15 Section B 7 20 8 20 Deductions Total 80 Section A Answer all questions. Section B Answer any one question. The number of marks is given in brackets [ ] at the end of each question or part question. You are reminded of the need for good English and clear presentation in your answers.

2 © Hwa Chong Institution 2024 8867 / JC2 Preliminary Examination Data Formulae speed of light in free space, c = 3.00  10 8 m s 1 elementary charge, e = 1.60  10 19 C unified atomic mass constant, u = 1.66  10 27 kg rest mass of electron, me = 9.11  10 31 kg rest mass of proton, mp = 1.67  10 27 kg the Avogadro constant, NA = 6.02  10 23 mol 1 gravitational constant, G = 6.67  10 11 N m 2 kg 2 acceleration of free fall, g = 9.81 m s 2 uniformly accelerated motion resistors in series resistors in parallel s = ut + 2 1 at2 v 2 = u 2 + 2as R = R1 + R2 + . . . 1/R = 1/R1 + 1/R2 + . . .

3 © Hwa Chong Institution 2024 8867 / JC2 Preliminary Examination BLANK PAGE

4 © Hwa Chong Institution 2024 8867 / JC2 Preliminary Examination Section A Answer all the questions in this section. 1 (a) A body has an initial velocity u and an acceleration a. After a time t, the body has moved a displacement s and has a final velocity v. One of the equations to describe the motion of this body is s = ut + 1 2at2 State the condition that must be satisfied for the above equation to be valid. … … ………………………..…….…….……………………………………………………………….. … ……………………………………………………………..………………………………………[ 1] (b) A hot air balloon is moving at a constant velocity of 11.7 m s-1, at an angle of 59° from the horizontal, as shown in Fig. 2.1. Fig. 2.1 (i) Determine the vertical component of the velocity of the balloon. vertical component of the velocity = ................................. m s-1 [1] 11.7 m s-1 59°

5 © Hwa Chong Institution 2024 8867 / JC2 Preliminary Examination (ii) A slotted mass is released from the balloon. Fig. 2.2 shows the subsequent path of the slotted mass. The dotted figure shows the position of the hot air balloon at the instant when the slotted mass is released. Fig. 2.2 1. Throughout the motion, the slotted mass is observed by a person in the hot air balloon to be directly below the balloon. Explain why this is so. … ……………………….…..………….………………………………………………………… … ……………………………………………………………..……………………………… ..[1] 2. Determine how far below the balloon would the slotted mass be after 3.0 s. You may assume that the slotted mass has not yet landed on the ground and that air resistance on the slotted mass is negligible. distance = ................................. m [3] [Total: 6] slotted mass

6 © Hwa Chong Institution 2024 8867 / JC2 Preliminary Examination 2 (a) State Newton’s third law of motion. ....................................................................................................................................................... ....................................................................................................................................................... ………..……............................................................................................. .................................[1] (b) In a track and field event, a high jumper jumps over a horizontal bar and lands on a thick mattress. Fig. 2.1 shows the instant where she is just clearing the bar at her maximum height. The high jumper is considered as a point mass labelled P. Fig. 2.1 (i) On Fig. 2.1, draw a labelled free body diagram to show the force(s) acting on her. [1] (ii) Fig. 2.2 shows the instant she lands on the mattress. Fig. 2.2 1. On Fig. 2.2, draw a labelled free body diagram to show the forces acting on her. [1] P bar high jumper mattress floor

7 © Hwa Chong Institution 2024 8867 / JC2 Preliminary Examination 2. On Fig. 2.3, draw a labelled free body diagram to show the forces acting on the mattress. Fig. 2.3 [2] (c) Fig. 2.4 shows the variation with time t of the net force Fnet on her upon hitting the mattress. She has a mass of 50.0 kg and she comes to rest without rebounding at t = 1.20 s. Fig. 2.4 Determine the speed at which she hits the mattress. speed = ........................................ m s–1 [2] [Total: 7] Fnet / N t / s 0 0 1.20 0.40 375 mattress floor

8 © Hwa Chong Institution 2024 8867 / JC2 Preliminary Examination 3 (a) State the conditions for a rigid body to be in static equilibrium. ................................ ................................ ................................ ................................ ................. ................................ ................................ ................................ ................................ ................. ................................ ................................ ................................ ................................ ............. [2] (b) Fig. 3.1 shows a uniform ladder of weight 80 N resting on a smooth wall and a rough floor. The ladder makes an angle of 60° with the floor. Fig. 3.1 (i) Show that the force exerted by the wall on the ladder is 23 N. [2]

9 © Hwa Chong Institution 2024 8867 / JC2 Preliminary Examination (ii) Calculate the force exerted by the floor on the ladder. magnitude of force = ................................. N angle force makes with the floor = .................................... [4] (iii) A person now stands on the ladder. The ladder remains stationary. State and explain the effects, if any, on 1. the vertical force exerted by the floor on the ladder, ……………………………………………………………………………………………….. ……………………………………………………………………………………………….. ……………………………………………………………………………………………[ 2] 2. the horizontal force exerted by the wall on the ladder. ……………………………………………………………………………………………….. ……………………………………………………………………………………………….. ……………………………………………………………………………………………[ 2] [Total: 12]

10 © Hwa Chong Institution 2024 8867 / JC2 Preliminary Exa