Question

Point masses 1, 2, 3 and 4 kg are lying at the point
(0, 0, 0), (2, 0, 0), (0, 3, 0) and (–2, –2, 0) respectively.
The moment of inertia of this system about x-axis
will be
(a) 43 kg – m² (b) 34 kg – m²
(c) 27 kg – m² (d) 72 kg – m²

Answer 1

Answer:

Point masses 1, 2, 3 and 4 kg are lying at the point

(0, 0, 0), (2, 0, 0), (0, 3, 0) and (–2, –2, 0) respectively.

The moment of inertia of this system about x-axis

will be

(a) 43 kg – m²

(b) 34 kg – m²

(c) 27 kg – m² ✔️✔️

(d) 72 kg – m²