Question

A thin uniform rod of mass 1 kg and length 120 cm is suspended by a wire that passes through its centre and perpendicular to its length .

Answer 1

your question is ----> A thin uniform rod of mass 1 kg and length 120 cm is suspended by a wire that passes through its centre and perpendicular to its length. find moment of inertia of rod.

solution : mass of uniform rod , m = 1kg

length of rod , l = 120cm = 1.2m

we know, moment of inertia of rod about an axis passing through its centre and perpendicular to its length is given by, $I=\frac{1}{12}ml^2$

= 1/12 × 1 × (1.2)²

= 1/12 × 1.44

= 0.12 kgm²

hence, answer is 0.12 kgm²