Turntable Designs
Find the inertia and mass?
You need to design a turntable industrial design that is 45.0 cm in diameter and has an energy kinetics of 0.270 J when turning at 49.0 rpm (revolutions per minute). What should be the moment of inertia of the turntable about the axis of rotation? If his workshop makes the dish in the form of a uniform solid disk, which I should be its mass? is 0205 for inertia, but still comes correct. I have an idea how to solve for the second but i can to resolve without inertia.
KE = (2.1) that ω ^ 2 ==> I = 2 (KE) / ω ^ 2 = 2 (270) / (49 * 2π / 60) ^ 2 = .0205 kgm ^ 2 For a solid disk, I = (1.2) mr ^ 2 ==> m = 2 I / r ^ 2 = 2 (0205) / (225) ^ 2 = 0.81 kg
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