There is a thin uniform disc of radius R and mass per unit area σ, in which a hole of radius R/2 has been cut out as shown in the figure. Inside the hole a square plate of same mass per unit area σ is inserted so that its corners touch the periphery of the hole. Find centre of mass of the system distance from O.

There is a thin uniform disc of radius R and mass per unit area σ, in

1.	There is a thin uniform disc of radius R and mass per unit area σ, in which a hole of radius R/2 has been cut out as shown in the figure. Inside the hole a square plate of same mass per unit area σ is inserted so that its corners touch the periphery of the hole. Find centre of mass of the system distance from O.
Answer» There is a thin uniform disc of radius R and mass per unit area $σ$ , in which a hole of radius R/2 has been cut out as shown in the figure. Inside the hole a square plate of same mass per unit area $σ$ is inserted so that its corners touch the periphery of the hole. Find centre of mass of the system distance from O.

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