Question

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here is a question of physics class 11⛄

please give me answer_/|\_



Four sphere of diameter, 2a and mass 'a' each are placed with their centers on covers of a square of side 'b'. calculate movement of inertia of system about 1 side of a square takes as it surface.


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Answer 1

M.I of 1,4 spheres about AB=2[25Ma2]

M.2 of 2,5 spheres about BC=2[25Ma2]

2,3 spheres about AB=45Ma2+2Mb2

∴I=85Ma2+2Mb2

Answer 2

In humans, the total optical power of the relaxed eye is approximately 60 dioptres. The cornea accounts for approximately two-thirds of this refractive power (about 40 dioptres) and the crystalline lens contributes the remaining one-third (about 20 dioptres).