physics

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A box, open at the top, in form of a cube of edge length 40 cm, is constructed from a metal plate. Find the coordinates of the center of mass of the box with respect to x, y, and z coordinate system.

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    Let the box bottom be centered at the origin, with sides parallel to the x and y axes.

    The center of mass is at x = 0 and y = 0 for reasons of symmetry. For the z coordinate, take the area-weighted mean of the z coordinates of the centers of the four sides and bottom. That would be
    z = 4*20/5 = 16 cm

    (0,0,16)

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