For a machine to be self sustaining, the relation between ϕ = Angle of friction and α = slope of thread, is

\(\frac{\alpha }{\phi } = constant\)

For a machine to be self sustaining, the relation between ϕ = Angle o

1.	For a machine to be self sustaining, the relation between ϕ = Angle of friction and α = slope of thread, is
A.	α = ϕ
B.	α < ϕ
C.	α > ϕ
D.	\(\frac{\alpha }{\phi } = constant\)
Answer» C. α > ϕ

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For a machine to be self sustaining, the relation between ϕ = Angle of friction and α = slope of thread, is

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