Physics · Oct / Nov 2020 · Paper 21 · Question 3
5054
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The question as text
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.
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3(a)(i)[2]
3(a)(ii)[2]
3(b)[2]
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