TMJC 2024 H1 Physics P2 QP n MS

CANDIDATE NAME ( ) CIVICS GROUP _________________________________________________________________________ H1 PHYSICS 8867/02 Paper 2: Structured Questions 11 September 2024 2 hours Candidates answer on the Question Paper. No Additional Materials are required. _________________________________________________________________________ READ THESE INSTRUCTIONS FIRST Write your name and Civics Group in the spaces at the top of the page. Write in dark blue or black pen on both sides of the paper. You may use an HB pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, glue or correction fluid. The use of an approved scientific calculator is expected, where appropriate. Section A Answer all questions. Section B Answer one question only. The number of marks is given in brackets [ ] at the end of each question or part question. ______________________________________________________________________________ This document consists of 25 printed pages and 1 blank page. TAMPINES MERIDIAN JUNIOR COLLEGE JC2 PRELIMINARY EXAMINATION For Examiner’s Use Percentage Subtotal P1 /30 / 33 Paper 2 1 / 10 2 / 15 3 / 10 4 / 10 5 / 15 6 / 20 7 / 20 Deductions Subtotal P2 / 80 / 67 Grand total / 100

2 Tampines Meridian Junior College 2024 JC2 Preliminary Examination H1 Physics Data speed of light in free space c = 8 13.00 10 m s  elementary charge e = 191.60 10 C unified atomic mass constant u = 271.66 10 kg rest mass of electron me = 319.11 10 kg rest mass of proton mp = 271.67 10 kg the Avogadro constant NA = 23 16.02 10 mol  gravitational constant G = 11 2 26.67 10 N m kg  acceleration of free fall g = 29.81 m s Formulae uniformly accelerated motion s = ut + at2 v2 = u2 + 2as resistors in series R = … resistors in parallel 1 / R = … 1 2 1 2R R  1 21/ 1/R R 

3 Tampines Meridian Junior College 2024 JC2 Preliminary Examination H1 Physics Section A Answer all questions in this section in the spaces provided. 1 Fig.1.1 shows an elongated block with a square cross sectional area of a particular conducting material. The rate of thermal energy transfer with respect to time, q, through the block is given by Tq py x      2 where p is the conductivity of the material; y is the length of the square cross-sectional area of the material; T is the temperature difference between the two ends of the material; and x is the length of the block. Fig. 1.2 shows the data obtained in a particular experiment. Fig. 1.2 quantity value percentage uncertainty T 323 K ± 0.50% x 1.00 m ± 1.0% p 237 W m−1 K−1 ± 2.0% y 0.200 cm ± 3.0% (a) Determine the SI base units of p. SI base units of p = ………………… [2] y Fig. 1.1 x

4 Tampines Meridian Junior College 2024 JC2 Preliminary Examination H1 Physics (b) Using the values given in Fig. 1.2, (i) determine the value of q, to three significant figures. q = ………………… W [2] (ii) determine the percentage uncertainty of q. percentage uncertainty of q = ………………… % [2] (c) Use your answer in (b) to determine the actual uncertainty in the value of q. Hence give a statement of q, with its uncertainty, to an appropriate number of significant figures. q = …………………± …………………W [2] (d) The accepted value of q is 0.29 W. State and explain whether your value in (c) is accurate. ...………………………………………………………………………………………… [2]

5 Tampines Meridian Junior College 2024 JC2 Preliminary Examination H1 Physics 2 A compressible ball of mass 0.50 kg is released from rest at time t = 0 s and falls freely. It hits the ground after falling downwards for 2.0 s. Take the sign convention of up as positive. (a) (i) State the acceleration of the ball during the fall. acceleration = ………………… m s −2 [1] (ii) Show that the velocity of the ball just before it hits the ground is −20 m s−1. [1] (iii) Calculate the magnitude of the impulse on the ball from t = 0 s to t = 2.0 s. magnitude of impulse = ………………… N s [2]

6 Tampines Meridian Junior College 2024 JC2 Preliminary Examination H1 Physics When the ball hits the ground, it stays on the ground for 3.0 s (from t = 2.0 s to 5.0 s) before rebounding. Fig. 2.1 shows how the resultant force FR on the ball varies with time t. Fig. 2.1 (b) (i) Explain why at t = 2.4 s the ball reaches its maximum speed. …………………………………………………………….………………………….. …………………………………………………………….…………………… [1] (ii) Use Fig. 2.1 to show that the maximum speed at t = 2.4 s is 22 m s−1. [2] (iii) Determine the maximum acceleration of the ball. maximum acceleration = ………………… m s −2 [2] FR / N t / s 1 2 3 4 5 0 20 10 −10 −20

7 Tampines Meridian Junior College 2024 JC2 Preliminary Examination H1 Physics Fig. 2.2 shows the variation with time t of velocity v of the ball from t = 2.0 s to 6.0 s. Fig. 2.2 (c) (i) On Fig. 2.2, complete the sketch by drawing the graph from t = 0 s to 2.0 s. [1] (ii) Describe how the speed of the ball changes from t = 2.0 s (when the ball first hits the ground) to t = 3.8 s. …………………………………………………………….………………………….. …………………………………………………………….………………………….. …………………………………………………………….………………………….. …………………………………………………………….…………………… [2] (iii) Mark and label the point X where the ball reaches its maximum height after the bounce. [1] (iv) State and explain whether the collision is elastic. …………………………………………………………….………………………….. …………………………………………………………….………………………….. …………………………………………………………….…………………… [2] velocity v / m s−1 t / s 1 2 3 4 5 −10 −30 −20 0 10

8 Tampines Meridian Junior College 2024 JC2 Preliminary Examination H1 Physics 3 (a) A small metal sphere has a mass of 1.0 × 10−4 kg and charge +2.0 nC. It is placed between two parallel, oppositely -charged horizontal plates and directly above an insulated spring as shown in Fig. 3.1. The electric field strength is 1.5 × 105 V m−1. Fig. 3.1 (i) Determine the magnitude and direction of the electric force on the sphere. magnitude of electric force = ………………… N direction = ……………… … … [3] spring + + + + + + − − − − − − charged metal sphere

9 Tampines Meridian Junior College 2024 JC2 Preliminary Examination H1 Physics The sphere is released from rest at a height of 0.50 m above the spring. Air resistance is negligible. (ii) Describe the changes in the energies of the sphere as it falls before hitting the spring. …………………………………………………………….………………………….. …………………………………………………………….………………………….. …………………………………………………………….…………………… [2] (iii) The sphere hits the spring and causes a maximum compression of 0.015 m. Determine the spring constant. spring constant = ……………… N m−1 [3]

10 Tampines Meridian Junior College 2024 JC2 Preliminary Examination H1 Physics (b) The sphere is now removed from the electric field and projected at an angle of 30° to the horizontal as shown in Fig. 3.2. Air resistance is negligible. Fig. 3.2 Fig. 3.3 shows the variation with time of the total energy ET and gravitational potential energy EP of the sphere. On Fig. 3.3, sketch the corresponding kinetic energy graph and label it EK.