RI 2024 H2 Physics Promo Sect B QP

Name: ( ) CT Group: 25S0 RAFFLES INSTITUTION 2024 YEAR 5 PROMOTION EXAMINATION H2 PHYSICS 9749 2 h 30 min Section B RAFFLES INSTITUTION RAFFLES INSTITUTION RAFFLES INSTITUTION RAFFLES INSTITUTION RAFFLES INSTITUTION RAFFLES INSTITUTION RAFFL ES INSTITUTION RAFFLES INSTITUTION RAFFLES INSTITUTION RAFFLES INSTITUTION RAFFLES INSTITUTION RAFFLES INSTITUTION RAFFLES INSTITUTION RAFFL ES INSTITUTION RAFFLES INSTITUTION RAFFLES INSTITUTION RAFFLES INSTITUTION RAFFLES INSTITUTION RAFFLES INSTITUTION RAFFLES INSTITUTION RAFFL ES INSTITUTION RAFFLES INSTITUTION RAFFLES INSTITUTION RAFFLES INSTITUTION RAFFLES INSTITUTION RAFFLES INSTITUTION RAFFLES INSTITUTION RAFFL ES INSTITUTION RAFFLES INSTITUTION RAFFLES INSTITUTION RAFFLES INSTITUTION RAFFLES INSTITUTION RAFFLES INSTITUTION RAFFLES INSTITUTION RAFFL ES INSTITUTION Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Name, Index Number and CT Group 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 a 2B pencil for any diagrams or graphs. The use of an approved scientific calculator is expected, where appropriate. Answer all questions. The number of marks is given in brackets [ ] at the end of each question or part question. For Examiner’s Use Section A / 15 16 / 8 17 / 9 18 / 8 19 / 10 20 / 9 21 / 17 22 / 19 Deductions Total / 95 There are 12 printed pages, inclusive of the cover page, in this booklet.

2 © Raffles Institution 16 To determine the Young modulus E of a metal, a student conducts an experiment on a wire made of the metal. Data collected from the experiment are shown below: ( ) ( ) ( ) ( ) 10.0 0.1 N 0.500 0.001 m 0.5 0.1 mm 0.21 0.01 mm F L d e = ± = ± = ± = ± where F is the applied force L is the original length of the wire d is the diameter of the wire e is the extension of the wire. The Young modulus E is given by the equation: FLE Ae= where A is the cross-sectional area of the wire. (a) (i) Show that the unit of E is equivalent to Pa. [1] (ii) Determine the Young modulus E of this wire, to three significant figures. E = Pa [2]

3 © Raffles Institution [Turn over (iii) Use your answer in (a)(ii) to determine the actual uncertainty in the value of E. Hence give a statement of E , with its uncertainty, to an appropriate number of significant figures. E = ± Pa [3] (b) State the quantity that contributes most significantly to the uncertainty in E and suggest an improvement that can be made to reduce the uncertainty in E. [2] [Total: 8]

4 © Raffles Institution 17 During a basketball game, a player tries to shoot the ball into the