JEE MAIN - Physics (2021 - 31st August Evening Shift - No. 3)
A system consists of two identical spheres each of mass 1.5 kg and radius 50 cm at the end of light rod. The distance between the centres of the two spheres is 5 m. What will be the moment of inertia of the system about an axis perpendicular to the rod passing through its midpoint?
18.75 kgm2
1.905 $$\times$$ 105 kgm2
19.05 kgm2
1.875 $$\times$$ 105 kgm2
Explanation
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M = 1.5 kg, r = 0.5 m, d = $${5 \over 2}$$ m
$$I = 2\left( {{2 \over 5}M{r^2} + M{d^2}} \right)$$
= 19.05 kgm2
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