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With-reference-to-figure-of-a-cube-of-edge-a-and-mass-m-state-whether-the-following-are-true-or-false-O-is-the-centre-of-the-cube-1-The-moment-of-inertia-of-cube-about-z-axis-is-I-z-I-x-




Question Number 25013 by Tinkutara last updated on 01/Dec/17
With reference to figure of a cube of  edge a and mass m, state whether the  following are true or false. (O is the  centre of the cube.)  (1) The moment of inertia of cube  about z-axis is, I_z  = I_x  + I_y   (2) The moment of inertia of cube  about z′ is, I_(z′)  = I_z  + ((ma^2 )/2)  (3) The moment of inertia of cube  about z′′ is, I_(z′)  = I_z  + ((ma^2 )/2)  (4) I_x  = I_y
Withreferencetofigureofacubeofedgeaandmassm,statewhetherthefollowingaretrueorfalse.(Oisthecentreofthecube.)(1)Themomentofinertiaofcubeaboutzaxisis,Iz=Ix+Iy(2)Themomentofinertiaofcubeaboutzis,Iz=Iz+ma22(3)Themomentofinertiaofcubeaboutzis,Iz=Iz+ma22(4)Ix=Iy
Commented by Tinkutara last updated on 01/Dec/17
Commented by ajfour last updated on 01/Dec/17
I_Z =((ma^2 )/6) ,   I_(Z ′) =((ma^2 )/6)+((ma^2 )/2)=((2ma^2 )/3)  I_X =I_Y =((ma^2 )/6)+((ma^2 )/4)=((5ma^2 )/(12))  I_(Z ′′) = ? .....
IZ=ma26,IZ=ma26+ma22=2ma23IX=IY=ma26+ma24=5ma212IZ=?..
Commented by Tinkutara last updated on 02/Dec/17
How I_z =((ma^2 )/6)?
HowIz=ma26?

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