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Look at picture for more details....

Book says.....

" A body is free to rotate only about the z-axis. Within the body any particle of

mass m can move only in a plane parallel to the xy plane."

What would the xy plane look like? I am assuming by "xy plane" this does not mean x and y axis...?

I added a picture of what I think they are talking about... is this correct??

Book says.....

" A body is free to rotate only about the z-axis. Within the body any particle of

mass m can move only in a plane parallel to the xy plane."

What would the xy plane look like? I am assuming by "xy plane" this does not mean x and y axis...?

I added a picture of what I think they are talking about... is this correct??