Rotated Rev

A potter’s wheel having a radius 0.46 m and a moment of inertia 11.1 kg·m2 is rotating freely at 53 rev/min. T

A potter’s wheel having a radius 0.46 m and a moment of inertia 11.1 kg·m2 is rotating freely at 53 rev/min. The potter can stop the wheel in 5.5 s by pressing a wet rag against the rim and exerting a radially inward force of 69 N. Find the effective coefficient of kinetic friction between the wheel and the wet rag.

α = ∆ω/∆t = 53(2π/60)/5.5 = 1.009 rad/sec²

Q = I*α = 11.2 N∙m

Ff = µFn = Q/r = 24.35 N

µ = 24.35/Fn = .353

12 valve Dodge Cummins 4000 rpm rev. and smoke

Deft Detour 360: Rotating iPad 2 Case: Folio Convertible Cover Multi-angle Vertical and Horizontal Stand with Smart On/Off for the Apple iPad2 (for new iPad 3rd generation search Amazon for DET-IP3-BLK). $29.95 Note: This case is for the iPad 2 only. If you have a “New iPad” (3rd generation). Please search Amazon for DET-IP3-BLK. The elegant Detour 360 is a unique, rotating stand/case for the iPad 2 that couples ultimate protection with functional styling. The case is designed to snap onto the iPad 2 easily and allow you the freedom to quickly open and close the case when you’re on the move, rotate t…