A bullet of mass 15 g is fi red with an initial speed of 300 m/s into a wooden block that is initially at rest. The bullet becomes lodged in the block, and the bullet and block then slide together on the floor for a distance of 1.5 m before coming to rest (Fig. P7.38). If the coefficient of friction between the block and the floor is 0.40, what is the mass of the block?
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