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A bullet of mass m = 28 g is fired into a wooden block of mass M = 4.1 kg as shown in the figure below. The block is attached to a string of length 1.5 m. The bullet is embedded in the block, causing the block to then swing as shown in the figure. If the block reaches a maximum height of h = 0.27 m, what was the initial speed of the bullet?

m/s

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