RVHS H2 Physics P4 QP

River Valley High School Page 1 of 20 H2 Physics 9749 JC2 Preliminary Examinations 2023 . RIVER VALLEY HIGH SCHOOL JC2 PRELIMINARY EXAMINATIONS H2 PHYSICS 9749 PAPER 4 24 AUG 2023 2 HRS 30 MIN CANDIDATE NAME CENTRE NUMBER S INDEX NUMBER CLASS 2 2 J INSTRUCTIONS TO CANDIDATES DO NOT OPEN THIS BOOKLET UNTIL YOU ARE TOLD TO DO SO. Read these notes carefully. Write your name, class and index number above. Candidates answer on the Question Paper. The use of an approved scientific calculator is expected, where appropriate. You may lose marks if you do not show your working or if you do not use appropriate units. Give details of the practical shift and laboratory where appropriate in the boxes provided. 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. Answer all questions. The number of marks is given in brackets [ ] at the end of each question or part question. SHIFT LABORATORY FOR EXAMINERS’ USE 1 / 21 2 / 11 3 / 11 4 / 12 TOTAL / 55 This document consists of 19 printed pages and 1 blank page.

River Valley High School Page 2 of 20 H2 Physics 9749 JC2 Preliminary Examinations 2023 1 In this experiment, you will investigate the equilibrium of a plastic cup. (a) You are provided with a cup attached to a string loop . A mass M is attached to the cup as shown in Fig. 1.1. The mass M is 50 g. Fig. 1.1 (i) Measure and record the mass of the cup m0. m0 = ……………………….. Pour approximately 25 ml of water into the cup. Measure and record the mass of the cup with water in it, m1. m1 = ……………………….. Hence determine the mass of water in the cup m. m = ……………………….. [1] (ii) Estimate the percentage uncertainty of m. Show your working clearly. percentage uncertainty of m = ……………………….. [1]

River Valley High School Page 3 of 20 H2 Physics 9749 JC2 Preliminary Examinations 2023 (b) Set up the apparatus as shown in Fig. 1.2. Fig. 1.2 (i) The horizontal distance between the edges of the cup is p, as shown in Fig. 1.2. Measure and record p. p = ……………………….. [1] (ii) Estimate the percentage uncertainty of your value of p. Show your working. percentage uncertainty = ……………………….. [1] water boss

River Valley High School Page 4 of 20 H2 Physics 9749 JC2 Preliminary Examinations 2023 (iii) Describe one significant source of uncertainty or limitation of the procedure in this experiment. ..................................................................................................................... .......................................................................................................... [1] (iv) Describe an improvement that could be made to address the uncertainty or limitation you have described in (b)(iii). You may suggest the use of other apparatus or different procedures. ..................................................................................................................... .......................................................................................................... [1] (c) Fig. 1.3 shows the different values of m and p. Complete Fig. 1.3 using your answer from (a)(i) and (b)(i). Include the values of √m and √p . m / g p / cm √m / g1/2 √p / cm1/2 34.55 6.5 45.08 5.9 55.14 5.0 64.70 4.6 74.95 3.8 Fig. 1.3 [1]

River Valley High School Page 5 of 20 H2 Physics 9749 JC2 Preliminary Examinations 2023 (d) (i) Use Fig. 1.3 to plot the graph of √p vs √m in Fig. 1.4. Fig. 1.4 [1] (ii) Draw the line of best fit in Fig. 1.4. [1] (iii) Determine the gradient and intercept of the graph in Fig. 1.4. gradient = ……………………….. intercept = ……………………….. [2] 1.80 2.00 2.20 2.40 2.60 2.80 3.00 3.20 4.00 5.00 6.00 7.00 8.00 9.00 √m / g1/2 √p / cm1/2

River Valley High School Page 6 of 20 H2 Physics 9749 JC2 Preliminary Examinations 2023 (iv) Use Fig. 1.4 and your answer in (d)(iii) to determine p when there is no water in the cup. Show your working clearly. p = ……………………….. cm [2] (e) (i) Empty the water you have used in (b) into the cup with M of 100 g slotted mass attached. Repeat (b)(i) to obtain a new value of p. p = ……………………….. cm [1] (ii) A student suggests that √p is directly proportional to √M . Use your values in (b)(i), (b)(ii) and (e)(i) to determine if the student’s suggestion is valid. Show your working clearly. ..................................................................................................................... ..................................................................................................................... .......................................................................................................... [2]

River Valley High School Page 7 of 20 H2 Physics 9749 JC2 Preliminary Examinations 2023 (f) θ is the angle of the cup above the horizontal as shown in Fig. 1.5. Fig. 1.5 Plan an experiment to determine accurately the mass of water in the cup m, when θ is 45o. Also explain how you would determine the maximum value of θ for this experiment. Your account should include: • control of variables • your experimental procedure • details of the table of measurements with appropriate units ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ...................................................................................................................... [5] [Total: 21] θ

River Valley High School Page 8 of 20 H2 Physics 9749 JC2 Preliminary Examinations 2023 2 In this experiment, you will investigate how the rate of cooling of a hot liquid depends on its volume. (a) You have been provided with a cup. The external diameter of the base of the cup is d as shown in Fig. 2.1. Fig. 2.1 Measure and record d.