Math Problem Statement
A shearing machine requires 2000 ft-lb of kinetic energy to operate. The mean diameter of the rim is 36 inches. The rated speeds is 66 at the mean diameter. If the coefficient of fluctuation is 0.2, a) what weight of rim is needed? Neglect the effect of the arms and hub. b) If the rim width is to be 4 times as large as the rim thickness, what are the rim width and thickness? Use cast iron as flywheel material with specific weight of 0.26 lb/in³
Solution
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Math Problem Analysis
Mathematical Concepts
Rotational Dynamics
Kinetic Energy
Moment of Inertia
Geometry
Conversions
Formulas
Kinetic Energy E = 1/2 * I * ω^2 * C
Moment of Inertia I = m * r^2
Angular Velocity ω = (2πN) / 60
Volume of Rim V = 2πr * b * t
Theorems
Rotational Kinetic Energy Theorem
Suitable Grade Level
Undergraduate Engineering
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