What is the vertical distance covered?

Hi all! I only got 5 m (in red) for the following question. I was unable to get the given answer of (5√3 - 5) m. Please teach me how to solve it. Thanks

A crane which carries cargo from a hatch, swings it to the side before lowering it onto the dock. The length of the crane’s jib is 10 m. Determine the vertical distance covered by the end of the jib when the operator raises the jib from 30o to 60o. Give your answer in surd form (√).

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1 Answer

  • david
    Lv 7
    9 months ago
    Favorite Answer

    Ground to top of jib = 10 X sin 30 = 5

    Ground to top of jib AFTER raising = 10 X sin 60 = 10X (sqrt 3)/2

    = 5 X (sqrt 3)

    dist raised = 5 X (sqrt 3) - 5

    • sacred9 months agoReport

      Thanks so much, you saved my day!!

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