In Fig. 2, a thin uniform rod (mass ??3.0? kg , length ??4.0 m )

rotates freely about a horizontal axis A? that is perpendicular to the

rod and passes through a point at distance ? ?d=1.0 ?? m from the

end of the rod. The kinetic energy of the rod as it passes through the

vertical position is ??20 J. (a) What is the rotational inertia of the rod

about axis ?A ? (b) What is the (linear) speed of the end ? Bof the rod

as the rod passes through the vertical position? (c) At what angle ?

will the rod momentarily stop in its upward swing?

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