Shaine
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.

### 5 Answers

Relevance
• 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.

• How do you think about the answers? You can sign in to vote the answer.
• 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.

Still have questions? Get your answers by asking now.