Lv 5
Shaine asked in Science & MathematicsEngineering · 6 months ago

Please explain this mechanical aptitude question?

I can't understand why the answer is (A) Rope X. Please explain in simple detail.

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5 Answers

  • qrk
    Lv 7
    6 months ago
    Favorite Answer

    Ropes will only provide support if in tension.

    X is in tension. Y is in compression (an odd way of describing a force on a rope) which provide no support.

    If Y were a rigid object like a steel rod, Y could supply support.

  • 6 months ago

    I assume there is a pivot pin through both arms.

    If you cut rope Y nothing happens, It is not necessary to the system.

    Rope X supports the entire load.

    If you can t understand why you are in the wrong field.

  • 6 months ago

    Rope Y will be slack. Rope x will have a large amount of tension.

  • sasha
    Lv 7
    6 months ago

    If Rope Y wasn't there, it would make no difference to the weight. All Rope Y does is keep the arm from going lower on that side, but the weight is pulling the entire arm so that the part on the right is trying to move upward.

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  • 6 months ago

    Look at the diagram. The arm of the crane has a force pulling down on the left. The rope x is the one that is resisting that force. Rope y can only allow the arm to go lower if not for the presence of rope x.

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