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A 108 g wooden block is initially at rest on a rough horizontal surface when a...

A 108 g wooden block is initially at rest on a rough horizontal surface when a 12.0 g bullet is fired horizontally into (but does not go through) it. After the impact, the block–bullet combination slides 6.5 m before coming to rest. If the coefficient of kinetic friction between block and surface is 0.750, determine the speed of the bullet (in m/s) immediately before impact. m/s

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