GATE 2025 AR — Planning – Question 34

Building Construction, Materials, and Structural Systems · Building structural systems · 2 marks · Multiple choice

A see-saw has a 50 kg box 5 m to the left of fulcrum P and box B 8 m to the right. Find B’s mass for static equilibrium in kg.

Diagram for GATE 2025 AR — Planning question 34

50
31.25
80
61.25

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Show answer and explanation

Correct answer: (B) 31.25

Explanation

Moment balance about P requires 50g×5=mg×8. The common gravitational acceleration cancels, giving m=250/8=31.25 kg, B. Equal masses would not balance because the lever arms differ.

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