Question

calculate the m.l of a thin uniform ring about and Axis tangent to the ring.if it's M.L about an axis passing through the centre and perpendicular
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Answer 1

Answer:

ANSWER

Given , M.I. of a thin uniform ring about an axis passing through the centre and perpendicular to plane is 4kgm

2

=mr

2

.

Using Perpendicular axix theorem,

M.I. of a thin uniform ring about an axis passing through the centre and in the plane of the ring is 2kgm

2

=

2

1

mr

2

.

Now, Using Parallel axix theorem,

M.I. of ring about an axis tangent to the ring and in a plane of the ring

2

1

mr

2

+md

2

=

2

3

mr

2

=(

2

3

)4kgm

2

=6kgm

2

.

Therefore, C is correct option.