2. A triangular prism of mass M, whose two ends are equilateral triangles parallel to the xy plane with side 2a, is centered on the origin with its axis along the z-axis. Find its moment of inertia for rotation about its z-axis. Without doing any integrals write down and explain its two products of inertia for rotation about the z-axis. Hint: You can find the rotational inertia of an equilateral triangle of side 2a by dividing it into 4 equilateral triangles of side a. No integration is needed if you use the parallel axis theorem. 3. Find the inertia tensor for the prism of problem 2 of height h.
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First, we need to find the moment of inertia of an equilateral triangle of side 2a. As the hint suggests, we can divide it into 4 equilateral triangles of side a. The moment of inertia of an equilateral triangle of side a about its centroid is given by I = Show more…
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