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Please assist A 90 kg firefighter is standing on a massless ladder propped against a building as shown. The top of the ladder rests against

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A 90 kg firefighter is standing on a massless ladder propped against a building as shown. The top of the ladder rests against the building at a height of 6 meters. The firefighter is 1.5 meters (in the horizontal direction) from the base of the ladder. What is the normal force of the ladder against the wall? Show all work. 6 meters 1.5 meters

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