# Part A A ladder carried by a fire truck is 20.0 m long. The ladder weights 3800 N and its center of gravity is at its center. The ladder is pivoted at one end (A) about a pin (Figure 1): ignore the friction torque at the pin. The ladder is raised into position by a force applied by a hydraulic piston at C. Point C is 8.0 m from A, and the force Fexerted by the piston makes an angle of 40° with the ladder. Draw a free-body diagram of the ladder when it is just lifted off the support bracket at B. Draw the vectors starting at the black dots. The location and orientation of the vectors will be graded. The length of the vectors will not be graded. No elements selected 12.0 m 8.0 m B eg An Submit Prevlous Anawere v Correct • Part B What magnitude must F have to just lift the ladder off the support bracket at B? Figure (< 1 of 1> Express your answer to two significant figures and include the appropriate units. Templetes Symbols uhdo’ redo fese keyboard shortcuts Help F = Value Units 8,0 m Submit Requeet Answer Provide Feedback

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