Four identical solid sphere mass |RIGIDBODYDYNAMIJEEMain2021

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JEE MAIN 2021

26-02-2021 S1

Question

Four identical solid spheres each of mass 'm' and radius 'a' are placed with their centres on the four corners of a square of side 'b'. The moment of inertia of the system about one side of square where the axis of rotation is parallel to the plane of the square is :

Select the correct option:

A

$\frac{4}{5} m a^2+2 m b^2$

B

$\frac{8}{5} m a^2+m b^2$

C

$\frac{8}{5} m a^2+2 m b^2$

D

$\frac{4}{5} \mathrm{ma}^2$

✓ Correct! Well done.

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