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23 Nov 2019
A painter wishes to know whether or not he can safely stand on aladder. The ladder has a mass M1 = 11.0 kg which is uniformlydistributed throughout its length L = 9.9 m. The ladder is proppedup at an angle ? = 68°. The coefficient of static friction betweenthe ground and the ladder is µ = 0.242, and the wall against whichthe ladder is resting is frictionless.
a. Calculate the maximum mass of the painter for which the ladderwill remain stable when he climbs a distance d = 6.1 m up theladder.
b. If the painter does not stand on the ladder, what is the minimumangle ? for which the ladder will remain stable?
A painter wishes to know whether or not he can safely stand on aladder. The ladder has a mass M1 = 11.0 kg which is uniformlydistributed throughout its length L = 9.9 m. The ladder is proppedup at an angle ? = 68°. The coefficient of static friction betweenthe ground and the ladder is µ = 0.242, and the wall against whichthe ladder is resting is frictionless.
a. Calculate the maximum mass of the painter for which the ladderwill remain stable when he climbs a distance d = 6.1 m up theladder.
b. If the painter does not stand on the ladder, what is the minimumangle ? for which the ladder will remain stable?
Irving HeathcoteLv2
16 Nov 2019
