A coin lying on a meterstick starts to slide down when one end of the stick is raised 36.4cm above the horizontal. Find The limiting angle for friction and the coefficient of starting friction
a)
θ=arctanlm=20°,\theta=\arctan\frac lm=20°,θ=arctanml=20°,
b)
μ=lm=0.364.\mu=\frac lm=0.364.μ=ml=0.364.
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