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Find velocity of a bullet that hits a stationary block after the block slides to a stop.

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A bullet whose mass M1= .04 kg traveling horizontallyhits a stationary block of mass M2= 2.4 kg on a horizontal surface. After the impact, the block, with embedded bullet, slides distance x= 5 meters to a stop. The coefficient of friction is f= .50 between block and surface. Find the velocity V1 of the bullet before impact.

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Step 1.
After the impact, conservation of energy is that the kinetic energy immediately after impact is transformed into heat generated during the slide. Equating ...

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