First slide

Moment of intertia

Question

Four masses are fixed on a massless rod as shown in Figure . The moment of inertia about the axis P is about:

Easy

A

2 kg m²
B

1 kg m²
C

0.5 kg m²
D

0.3 kg m²

Solution

I_p = 2(0.4)² + 5 (0.2)² + 5(0.2)² + 2(0.4)² = 1.04 kg m²

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