−ac Q= CR + K + Rcρ − 2μ ( A+ a2 ),
L MM

(16)

so that, eliminating Q/L,

2 [( A+ c2 )( C+ a2 ) − a2c2 ] μ = ( C+ a2 )( CR + K) + CRcρ,
M MM MM

(17)

the condition when a coin or platter is rolling nearly flat on the table.

Rolling along in a straight path, with α = ½π, c = 0, μ = 0, E = 0; and

N/L = (CR + K)/A,

(18)

D = ( A+ a2 ) n2 + g (a − ρ),
M