Question a ufo lowers a 278kg stairway of length 529 m from, Ask an Expert

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Question: A UFO lowers a 278kg stairway of length 5.29 m from under its belly until it is fully extended at an angle of 54 degree. The stairway is free to pivot on hinge and it is supported at its far end by vertical cable.

Question 1: What is the tension in the cable?

Please explain each step and equations used for above question.

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