Q. Three identical thin rods, each of length 3.3 m and mass 3.27 kg, are welded perpendicular to each other. The complete set up is rotated about an axis that passes through the end of one rod and is parallel to another. Establish the moment of inertia of this arrangement.
Q. Imagine that we drop a block of mass m from a height h above the comparatively lightweight plate supported by a vertical spring with relaxed length L and spring constant k. From what value of h would we have to drop the block to compress spring to zero length?