Question

Obtain an expression for moment of inertia of uniform circular disc​

Answer 1

Answer:

from perpendicular axis theorem.

I  

′

=2I

⇒I=  

2

I  

′

 

​  

 

=(  

2

MR  

2

 

​  

)⋅  

2

1

​  

 

I=  

4

MR  

2

 

​  

 

We get,I=  

4

MR  

2

 

​  

.

Explanation:

Answer 2

Answer:

from the perpendicular axis theorem.

I′=2I

⇒I=2I′​

=(2MR2​)⋅21​

I=4MR2​

We get, I=4MR2​.