Synthesis Problem: A solid wooden cube of side length 2a and mass M rests on a h
ID: 2093185 • Letter: S
Question
Synthesis Problem:
A solid wooden cube of side length 2a and massM rests on a horizontal surface. The cube is constrained to rotate about afixed axis AB. A bullet of mass m and speed is fired at the opposite sideat height 4a/3 above the horizontal surface. The bullet becomesembedded in the cube.Find the minimum value of v required to tip the cube over, so that it fallson face ABCD.
Express your answer in terms of a, m, and M. Assumethat m is small enough, compared to M, that it does not change therotational inertia or center of mass of the cube after it embeds.Suggestions: This synthesis problem has similarities to the ballistic pendulum, involving an angularmomentum conservation step (explain WHY) and an energy conservation step.
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