Question

what is the moment of inertia of a cricular arc of angle 2A through an axis passing through its centre of mass?​

Answer 1

Answer:

Generally MOI denoted by = MR ^2

But an arc of Disc is removed

Now an arc subtending 30°  is removed which is

equal to   1 /2 th part of Disc

Remaining will be =   11 /12th  part

Thus MOI of final part will be =   11 /12 MR^2

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