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6 Oct 2020
A painter of mass 79.5 kg is 1.30 m from the top of a 6.64-m ladder. The ladder rests against a wall. Friction between the ladder and the wall is negligible. The ladder's mass is 4.80 kg. Assume the ladder is set up according to Occupational Safety and Health Administration standards so that it makes a 75.5° angle with the floor. (a) What is the minimum coefficient of static friction required for the painter's safety? (b) Would the rubber ladder tip on dry concrete be safe?
A painter of mass 79.5 kg is 1.30 m from the top of a 6.64-m ladder. The ladder rests against a wall. Friction between the ladder and the wall is negligible. The ladder's mass is 4.80 kg. Assume the ladder is set up according to Occupational Safety and Health Administration standards so that it makes a 75.5° angle with the floor. (a) What is the minimum coefficient of static friction required for the painter's safety? (b) Would the rubber ladder tip on dry concrete be safe?
VikasLv10
8 Mar 2021
