A 100-g bullet is fired horizontally into a 14.9 kg block ofwood resting on a ho

Question

A 100-g bullet is fired horizontally into a 14.9 kg block ofwood resting on a horizontal surace, and the bullet becomesembedded in the block. If the muzzle velocity is 250 m/s A) what isthe velocity of the block immeditely after the impact? B) if thecoefficient of kinetic friction betweent he block and the surfaceis 0.3, find the distance traveled by the block-bullet combinationbefore they come to a stop (using work-energy theorem) I have found the answer for A and understand it, but I do notknow where to begin for part B. A 100-g bullet is fired horizontally into a 14.9 kg block ofwood resting on a horizontal surace, and the bullet becomesembedded in the block. If the muzzle velocity is 250 m/s A) what isthe velocity of the block immeditely after the impact? B) if thecoefficient of kinetic friction betweent he block and the surfaceis 0.3, find the distance traveled by the block-bullet combinationbefore they come to a stop (using work-energy theorem) I have found the answer for A and understand it, but I do notknow where to begin for part B.

Explanation / Answer

if m and M be the mass of the bullet and mass of theblock if the intial velocity of the bullet be v and V' ebt ehvelocity of the block just after hit by the bullet                          mv =Mv'       if d be the distance moved bythe block on the rough surface            by energy conservation                        mv^2 /2 =Mg*d      

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