Question

Four mass are fixed on a mass less rod as shown, the moment of inertia about the axis P in kg $m^2$

• A. 1.02 kgm²
• B. 1.03kgm²
• C. 1.04kgm²
• D. 1.05kgm²

Answer 1

The correct option is C

1.04kgm²

Moment of inertia of the four masses about the axis 'P',

$I=2(0.4{)}^2+5(0.2{)}^2+5(0.2{)}^2+2(0.4{)}^2$

$I=4(0.4{)}^2+10(0.2{)}^2$

$I=1.04kg{m}^2$