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  • Four point mass (each of mass m) are arranged in the x-y plane. The moment inertia of masses about y-axis is   <img src="https://cdn.entrance360.com/media/uploads/2019/09/1

Four point mass (each of mass m) are arranged in the x-y plane. The moment inertia of masses about y-axis is

 

Option: 1

6ma^{2}

 


Option: 2

4 ma^{2}


Option: 3

2 ma^{2}


Option: 4

ma^{2}


Answers (1)

best_answer

 

 

Moment of inertia for system of particle -

I= m_{1}r_{1}^{2}+m_{2}r_{2}^{2}+.........m_{n}r_{n}^{2}

\dpi{100} = \sum_{i=1}^{n}\: m_{i}r_{i}^{2}

So  Moment of motion=m(0)^{2}+m(2a)^{2}+m(a)^{2}+m(a)^{2}=6ma^{2}

 

Posted by

Ajit Kumar Dubey

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