What are coordinates of the center of mass for the uniform plate shown in the figure below
Let the plate be divided into left and right portions about the y-axis.
xcm,left = -5 cm, ycm,left = 0
xcm,right = 5 cm, ycm,right = 0
From symmetry, we can see that the y-coordinate of the center of mass of the whole plate is zero.
Aleft = (20 + 20) * 10 = 400 cm2
Aright = (10 + 10) * 10 = 200 cm2
So, xcm = {[400 * (-5)] + (200 * 5)} / (400 + 200) = -1.67 cm
From symmetry, we can see that the y-coordinate of the center of mass of the whole plate is zero.
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