Frequently Asked Questions
What is rotational kinetic energy?
Energy stored in rotation: KE = ½Iω². Analogous to translational ½mv² but with moment of inertia instead of mass and angular velocity instead of linear.
How do I find the moment of inertia?
Depends on shape and axis. Uniform disk: I = ½MR². Solid sphere: I = ⅖MR². Use a moment-of-inertia table for specific shapes.
RPM vs rad/s?
1 RPM ≈ 0.1047 rad/s. Multiply by 2π/60 to convert RPM to rad/s.
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