OCR Interchange October 2021 A Level Physics/ H556/01 Modelling physics/best solution

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October 2021 A Level Physics A H556/01 Modelling physics Time allowed: 2 hours 15 minutes * H 5 5 6 0 1 * INSTRUCTIONS • Use black ink. You can use an HB pencil, but only for graphs and diagrams. �... � Write your answer to each question in the space provided. If you need extra space use the lined pages at the end of this booklet. The question numbers must be clearly shown. • Answer all the questions. • Where appropriate, your answer should be supported with working. Marks might be given for using a correct method, even if your answer is wrong. INFORMATION • The total mark for this paper is 100. • The marks for each question are shown in brackets [ ]. • Quality of extended response will be assessed in questions marked with an asterisk (*). • This document has 28 pages. ADVICE • Read each question carefully before you start your answer. SECTION A You should spend a maximum of 30 minutes on this section. Write your answer to each question in the box provided. Answer all the questions. 1 An object is moving in a straight line. The displacement s against time t graph for this object is shown below. s / m 3.0 2.0 1.0 0 B 0 1.0 2.0 3.0 t / s At which point A, B, C or D, does the object have the greatest speed? Your answer [1] 2 Which one of the following prefixes represents the smallest multiplication factor? A femto (f) B micro (μ) C nano (n) D pico (p) Your answer [1] 3 The table shows some data for a car travelling on a straight road with an initial speed of 13 m s–1. Thinking distance/ m 9.0 Braking distance / m 14 Stopping distance / m 23 The car has a constant deceleration when the brakes are applied. What is the magnitude of the deceleration of the car during braking? A 0.46 m s–2 B 3.7 m s–2 C 6.0 m s–2 D 9.4 m s–2 Your answer [1] 4 The freezing point of ethanol is 159 K. What is 159 K in °C? A – 432 °C B – 114 °C C 114 °C D 432 °C Your answer [1] 5 A spectral line corresponds to a wavelength λ1 in the laboratory. The same spectral line observed in the spectrum of a receding galaxy corresponds to a wavelength λ2. The distance of the galaxy from the Earth is d. The speed of light in a vacuum is c. What is the correct expression for the Hubble constant H0? [Show More]

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