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GATE 2024 BM – Question 62

Biomechanics · Joint Forces and Equilibrium · 2 marks · Numerical answer

An artificial forearm has moment of inertia 0.3 kg m² about its centre of mass,mass 3 kg,and centre of mass 20 cm from the elbow. Find inertia about the elbow in kg m² to two decimals.

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Correct answer: 0.40 to 0.45

Explanation

Use the parallel-axis theorem: Ielbow=Icm+md². With d=0.20 m, the added term is 3×0.20²=0.12 kg m². Total is 0.30+0.12=0.42 kg m².

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