Transcription of Cambridge O Level - GCE Guide
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Cambridge O Level - GCE Guide
Cambridge O Level * 4 0 9 7 2 6 3 5 8 2 *. PHYSICS 5054/21. Paper 2 Theory October/November 2020. 1 hour 45 minutes You must answer on the question paper. No additional materials are needed. INSTRUCTIONS. Section A: answer all questions. Section B: answer two questions. Use a black or dark blue pen. You may use an HB pencil for any diagrams or graphs. Write your name, centre number and candidate number in the boxes at the top of the page. Write your answer to each question in the space provided. Do not use an erasable pen or correction fluid. Do not write on any bar codes. You may use a calculator. You should show all your working and use appropriate units.
4 UCLES 2020 5054/21/O/N/20 3 Fig. 3.1 shows a door and an automatic door-closer viewed from above. point X door bar bar fixed to wall hinge door closer 0.72 m P F Fig. 3.1 When the door opens and closes, the hinge acts as a pivot. A girl opens the door by exerting a force P at point X. Force P is perpendicular to the surface of the door. (a) Fig. 3.1 shows that point X is a distance …
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