Y 0 Fig. 2.30 2.25. Rope between inclines ** A rope rests on two platforms that are both inclined at an angle 0 (which you are free to pick), as shown in Fig. 2.30. The rope has uniform mass nadensity, and the coefficient of friction between it and the platforms is 1. The system has left-right symmetry. What is the largest possible fraction of the rope that does not touch the platforms? What angle 0 allows this maximum fraction?

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A: here given that object distance, u=175 cm focal length, f=+50 cm length of pencil= 10 cm

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A: ng = 1.80  (refractive index of flint glass)  R = +5 cm     ( radius of convex  hemisphere)  u = - 8…

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A:

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A: Distance=25cm

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Q: . Find the focal length of the glass lens in both figure?

A: Given diagrams: R1=24 cm , R2=40 cm R1=∞, R2=40 cmWe know, Refractive index of glass is n=1.5