Problem

A roofer, having a mass of 70 kg, walks slowly in an upright position down along the sur...

A roofer, having a mass of 70 kg, walks slowly in an upright position down along the surface of a dome that has a radius of curvature of r = 20 m. If the coefficient of static friction between his shoes and the dome is = 0.7, determine the angle θ at which he first begins to slip.

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