There are certain integrals which say integration over all m ,integration over all area,integration over line. I am confused with this. In calulus i am comfortable with integration with limits of an independent variable and the(adsbygoogle = window.adsbygoogle || []).push({});

integration results in the area under the curve. But in doing the moment of inertia of a solid about the axis a small dm is present inside the integral

and we say to integrate it for M. What is this integration about M exactly .

Similarly what is integration over line and area. How can i visualize this?

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# Calculus-integration over mass

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