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A bullet of mass 6.0g is fired horizontally into a 2.6 kg wooden block atrest on a horizontal surface. The coefficient of kinetic frictionbetween block and surface is 0.26. The bullet comes to rest in theblock, which moves 2.10 m.

(a) What is the speed of the block immediately after the bulletcomes to rest within it?

(b) At what speed is the bullet fired?

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